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/*****************************************************************************
3
Copyright (C) 1995, 2010, Innobase Oy. All Rights Reserved.
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Copyright (C) 2008, 2009, Google Inc.
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Copyright (C) 2009, Percona Inc.
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Portions of this file contain modifications contributed and copyrighted by
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Google, Inc. Those modifications are gratefully acknowledged and are described
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briefly in the InnoDB documentation. The contributions by Google are
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incorporated with their permission, and subject to the conditions contained in
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the file COPYING.Google.
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Portions of this file contain modifications contributed and copyrighted
14
by Percona Inc.. Those modifications are
15
gratefully acknowledged and are described briefly in the InnoDB
16
documentation. The contributions by Percona Inc. are incorporated with
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their permission, and subject to the conditions contained in the file
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
26
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
29
this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
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St, Fifth Floor, Boston, MA 02110-1301 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/srv0srv.h
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The server main program
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Created 10/10/1995 Heikki Tuuri
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*******************************************************/
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#ifndef UNIV_HOTBACKUP
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#include "sync0sync.h"
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#include "que0types.h"
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#include "trx0types.h"
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extern const char* srv_main_thread_op_info;
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/** Prefix used by MySQL to indicate pre-5.1 table name encoding */
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/** LOOKIE HERE!!!! This used to be srv_mysql50_table_name_prefix[10]
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which was a buffer overrun, because it didn't allow for the trailing
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static const std::string srv_mysql50_table_name_prefix("#mysql50#");
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/* When this event is set the lock timeout and InnoDB monitor
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thread starts running */
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extern os_event_t srv_lock_timeout_thread_event;
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/* The monitor thread waits on this event. */
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extern os_event_t srv_monitor_event;
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/* The lock timeout thread waits on this event. */
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extern os_event_t srv_timeout_event;
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/* The error monitor thread waits on this event. */
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extern os_event_t srv_error_event;
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/* If the last data file is auto-extended, we add this many pages to it
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#define SRV_AUTO_EXTEND_INCREMENT \
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(srv_auto_extend_increment * ((1024 * 1024) / UNIV_PAGE_SIZE))
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/* This is set to TRUE if the MySQL user has set it in MySQL */
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extern ibool srv_lower_case_table_names;
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/* Mutex for locking srv_monitor_file */
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extern mutex_t srv_monitor_file_mutex;
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/* Temporary file for innodb monitor output */
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extern FILE* srv_monitor_file;
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/* Mutex for locking srv_dict_tmpfile.
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This mutex has a very high rank; threads reserving it should not
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be holding any InnoDB latches. */
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extern mutex_t srv_dict_tmpfile_mutex;
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/* Temporary file for output from the data dictionary */
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extern FILE* srv_dict_tmpfile;
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/* Mutex for locking srv_misc_tmpfile.
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This mutex has a very low rank; threads reserving it should not
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acquire any further latches or sleep before releasing this one. */
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extern mutex_t srv_misc_tmpfile_mutex;
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/* Temporary file for miscellanous diagnostic output */
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extern FILE* srv_misc_tmpfile;
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/* Server parameters which are read from the initfile */
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extern char* srv_data_home;
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#ifdef UNIV_LOG_ARCHIVE
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extern char* srv_arch_dir;
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#endif /* UNIV_LOG_ARCHIVE */
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/** store to its own file each table created by an user; data
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dictionary tables are in the system tablespace 0 */
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#ifndef UNIV_HOTBACKUP
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extern my_bool srv_file_per_table;
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extern ibool srv_file_per_table;
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#endif /* UNIV_HOTBACKUP */
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/** The file format to use on new *.ibd files. */
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extern ulint srv_file_format;
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/** Whether to check file format during startup. A value of
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DICT_TF_FORMAT_MAX + 1 means no checking ie. FALSE. The default is to
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set it to the highest format we support. */
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extern ulint srv_max_file_format_at_startup;
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/** Place locks to records only i.e. do not use next-key locking except
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on duplicate key checking and foreign key checking */
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extern ibool srv_locks_unsafe_for_binlog;
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#endif /* !UNIV_HOTBACKUP */
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/* If this flag is TRUE, then we will use the native aio of the
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OS (provided we compiled Innobase with it in), otherwise we will
126
use simulated aio we build below with threads.
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Currently we support native aio on windows and linux */
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extern my_bool srv_use_native_aio;
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extern ibool srv_use_native_conditions;
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extern ulint srv_n_data_files;
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extern char** srv_data_file_names;
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extern ulint* srv_data_file_sizes;
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extern ulint* srv_data_file_is_raw_partition;
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extern ibool srv_auto_extend_last_data_file;
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extern ulint srv_last_file_size_max;
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extern char** srv_log_group_home_dirs;
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#ifndef UNIV_HOTBACKUP
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extern unsigned int srv_auto_extend_increment;
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extern ibool srv_created_new_raw;
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extern ulint srv_n_log_groups;
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extern ulint srv_n_log_files;
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extern ulint srv_log_file_size;
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extern ulint srv_log_buffer_size;
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extern ulong srv_flush_log_at_trx_commit;
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extern bool srv_adaptive_flushing;
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/* The sort order table of the MySQL latin1_swedish_ci character set
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#if defined(BUILD_DRIZZLE)
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extern const byte srv_latin1_ordering[256];
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extern bool srv_use_sys_malloc;
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extern const byte* srv_latin1_ordering;
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# ifndef UNIV_HOTBACKUP
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extern my_bool srv_use_sys_malloc;
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extern ibool srv_use_sys_malloc;
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# endif /* UNIV_HOTBACKUP */
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#endif /* BUILD_DRIZZLE */
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extern ulint srv_buf_pool_size; /*!< requested size in bytes */
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extern ulint srv_buf_pool_instances; /*!< requested number of buffer pool instances */
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extern ulint srv_buf_pool_old_size; /*!< previously requested size */
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extern ulint srv_buf_pool_curr_size; /*!< current size in bytes */
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extern ulint srv_mem_pool_size;
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extern ulint srv_lock_table_size;
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extern ulint srv_n_file_io_threads;
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extern ulong srv_read_ahead_threshold;
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extern ulint srv_n_read_io_threads;
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extern ulint srv_n_write_io_threads;
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/* Number of IO operations per second the server can do */
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extern ulong srv_io_capacity;
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/* Returns the number of IO operations that is X percent of the
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capacity. PCT_IO(5) -> returns the number of IO operations that
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is 5% of the max where max is srv_io_capacity. */
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#define PCT_IO(p) ((ulong) (srv_io_capacity * ((double) p / 100.0)))
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#ifdef UNIV_LOG_ARCHIVE
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extern ibool srv_log_archive_on;
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extern ibool srv_archive_recovery;
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extern ib_uint64_t srv_archive_recovery_limit_lsn;
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#endif /* UNIV_LOG_ARCHIVE */
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extern char* srv_file_flush_method_str;
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extern ulint srv_unix_file_flush_method;
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extern ulint srv_win_file_flush_method;
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extern ulint srv_max_n_open_files;
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extern ulint srv_max_dirty_pages_pct;
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extern ulint srv_force_recovery;
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extern ulong srv_thread_concurrency;
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extern ulint srv_max_n_threads;
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extern lint srv_conc_n_threads;
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extern ulint srv_fast_shutdown; /* If this is 1, do not do a
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purge and index buffer merge.
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If this 2, do not even flush the
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buffer pool to data files at the
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shutdown: we effectively 'crash'
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InnoDB (but lose no committed
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extern ibool srv_innodb_status;
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extern ib_uint64_t srv_stats_sample_pages;
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extern ibool srv_use_doublewrite_buf;
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extern ibool srv_use_checksums;
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extern ulong srv_max_buf_pool_modified_pct;
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extern ulong srv_max_purge_lag;
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extern ulong srv_replication_delay;
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/*-------------------------------------------*/
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extern ulint srv_n_rows_inserted;
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extern ulint srv_n_rows_updated;
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extern ulint srv_n_rows_deleted;
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extern ulint srv_n_rows_read;
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extern ibool srv_print_innodb_monitor;
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extern ibool srv_print_innodb_lock_monitor;
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extern ibool srv_print_innodb_tablespace_monitor;
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extern ibool srv_print_verbose_log;
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extern ibool srv_print_innodb_table_monitor;
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extern ibool srv_lock_timeout_active;
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extern ibool srv_monitor_active;
239
extern ibool srv_error_monitor_active;
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extern ulong srv_n_spin_wait_rounds;
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extern ulong srv_n_free_tickets_to_enter;
243
extern ulong srv_thread_sleep_delay;
244
extern ulong srv_spin_wait_delay;
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extern ibool srv_priority_boost;
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extern ulint srv_truncated_status_writes;
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extern ibool srv_print_thread_releases;
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extern ibool srv_print_lock_waits;
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extern ibool srv_print_buf_io;
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extern ibool srv_print_log_io;
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extern ibool srv_print_latch_waits;
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#else /* UNIV_DEBUG */
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# define srv_print_thread_releases FALSE
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# define srv_print_lock_waits FALSE
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# define srv_print_buf_io FALSE
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# define srv_print_log_io FALSE
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# define srv_print_latch_waits FALSE
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#endif /* UNIV_DEBUG */
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extern ulint srv_activity_count;
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extern ulint srv_fatal_semaphore_wait_threshold;
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extern ulint srv_dml_needed_delay;
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extern mutex_t* kernel_mutex_temp;/* mutex protecting the server, trx structs,
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query threads, and lock table: we allocate
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it from dynamic memory to get it to the
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same DRAM page as other hotspot semaphores */
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extern mutex_t* commit_id_mutex_temp;
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#define kernel_mutex (*kernel_mutex_temp)
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#define commit_id_mutex (*commit_id_mutex_temp)
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#define SRV_MAX_N_IO_THREADS 130
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/* Array of English strings describing the current state of an
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i/o handler thread */
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extern const char* srv_io_thread_op_info[];
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extern const char* srv_io_thread_function[];
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/* the number of the log write requests done */
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extern ulint srv_log_write_requests;
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/* the number of physical writes to the log performed */
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extern ulint srv_log_writes;
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/* amount of data written to the log files in bytes */
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extern ulint srv_os_log_written;
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/* amount of writes being done to the log files */
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extern ulint srv_os_log_pending_writes;
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/* we increase this counter, when there we don't have enough space in the
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log buffer and have to flush it */
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extern ulint srv_log_waits;
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/* the number of purge threads to use from the worker pool (currently 0 or 1) */
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extern ulong srv_n_purge_threads;
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/* the number of records to purge in one batch */
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extern ulong srv_purge_batch_size;
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/* variable that counts amount of data read in total (in bytes) */
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extern ulint srv_data_read;
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/* here we count the amount of data written in total (in bytes) */
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extern ulint srv_data_written;
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/* this variable counts the amount of times, when the doublewrite buffer
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extern ulint srv_dblwr_writes;
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/* here we store the number of pages that have been flushed to the
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doublewrite buffer */
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extern ulint srv_dblwr_pages_written;
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/* in this variable we store the number of write requests issued */
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extern ulint srv_buf_pool_write_requests;
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/* here we store the number of times when we had to wait for a free page
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in the buffer pool. It happens when the buffer pool is full and we need
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to make a flush, in order to be able to read or create a page. */
325
extern ulint srv_buf_pool_wait_free;
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/* variable to count the number of pages that were written from the
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buffer pool to disk */
329
extern ulint srv_buf_pool_flushed;
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/** Number of buffer pool reads that led to the
332
reading of a disk page */
333
extern ulint srv_buf_pool_reads;
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/** Status variables to be passed to MySQL */
336
typedef struct export_var_struct export_struc;
338
/** Status variables to be passed to MySQL */
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extern export_struc export_vars;
341
/** The server system */
342
typedef struct srv_sys_struct srv_sys_t;
344
/** The server system */
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extern srv_sys_t* srv_sys;
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# ifdef UNIV_PFS_THREAD
348
/* Keys to register InnoDB threads with performance schema */
349
extern mysql_pfs_key_t trx_rollback_clean_thread_key;
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extern mysql_pfs_key_t io_handler_thread_key;
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extern mysql_pfs_key_t srv_lock_timeout_thread_key;
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extern mysql_pfs_key_t srv_error_monitor_thread_key;
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extern mysql_pfs_key_t srv_monitor_thread_key;
354
extern mysql_pfs_key_t srv_master_thread_key;
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/* This macro register the current thread and its key with performance
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# define pfs_register_thread(key) \
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struct PSI_thread* psi = PSI_server->new_thread(key, NULL, 0);\
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PSI_server->set_thread(psi); \
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/* This macro delist the current thread from performance schema */
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# define pfs_delete_thread() \
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PSI_server->delete_current_thread(); \
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# endif /* UNIV_PFS_THREAD */
377
#endif /* !UNIV_HOTBACKUP */
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/** Types of raw partitions in innodb_data_file_path */
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SRV_NOT_RAW = 0, /*!< Not a raw partition */
382
SRV_NEW_RAW, /*!< A 'newraw' partition, only to be
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SRV_OLD_RAW /*!< An initialized raw partition */
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/** Alternatives for the file flush option in Unix; see the InnoDB manual
388
about what these mean */
390
SRV_UNIX_FSYNC = 1, /*!< fsync, the default */
391
SRV_UNIX_O_DSYNC, /*!< open log files in O_SYNC mode */
392
SRV_UNIX_LITTLESYNC, /*!< do not call os_file_flush()
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when writing data files, but do flush
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after writing to log files */
395
SRV_UNIX_NOSYNC, /*!< do not flush after writing */
396
SRV_UNIX_O_DIRECT /*!< invoke os_file_set_nocache() on
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/** Alternatives for file i/o in Windows */
402
SRV_WIN_IO_NORMAL = 1, /*!< buffered I/O */
403
SRV_WIN_IO_UNBUFFERED /*!< unbuffered I/O; this is the default */
406
/** Alternatives for srv_force_recovery. Non-zero values are intended
407
to help the user get a damaged database up so that he can dump intact
408
tables and rows with SELECT INTO OUTFILE. The database must not otherwise
409
be used with these options! A bigger number below means that all precautions
410
of lower numbers are included. */
412
SRV_FORCE_IGNORE_CORRUPT = 1, /*!< let the server run even if it
413
detects a corrupt page */
414
SRV_FORCE_NO_BACKGROUND = 2, /*!< prevent the main thread from
415
running: if a crash would occur
416
in purge, this prevents it */
417
SRV_FORCE_NO_TRX_UNDO = 3, /*!< do not run trx rollback after
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SRV_FORCE_NO_IBUF_MERGE = 4, /*!< prevent also ibuf operations:
420
if they would cause a crash, better
422
SRV_FORCE_NO_UNDO_LOG_SCAN = 5, /*!< do not look at undo logs when
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starting the database: InnoDB will
424
treat even incomplete transactions
426
SRV_FORCE_NO_LOG_REDO = 6 /*!< do not do the log roll-forward
427
in connection with recovery */
430
#ifndef UNIV_HOTBACKUP
431
/** Types of threads existing in the system. */
432
enum srv_thread_type {
433
SRV_COM = 1, /**< threads serving communication and queries */
434
SRV_CONSOLE, /**< thread serving console */
435
SRV_WORKER, /**< threads serving parallelized queries and
436
queries released from lock wait */
438
/* Utility threads */
439
SRV_BUFFER, /**< thread flushing dirty buffer blocks */
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SRV_RECOVERY, /**< threads finishing a recovery */
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SRV_INSERT, /**< thread flushing the insert buffer to disk */
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SRV_MASTER /**< the master thread, (whose type number must
447
/*********************************************************************//**
448
Boots Innobase server.
449
@return DB_SUCCESS or error code */
454
/*********************************************************************//**
455
Initializes the server. */
460
/*********************************************************************//**
461
Frees the data structures created in srv_init(). */
466
/*********************************************************************//**
467
Initializes the synchronization primitives, memory system, and the thread
471
srv_general_init(void);
472
/*==================*/
473
/*********************************************************************//**
474
Gets the number of threads in the system.
475
@return sum of srv_n_threads[] */
478
srv_get_n_threads(void);
479
/*===================*/
480
/*********************************************************************//**
481
Returns the calling thread type.
482
@return SRV_COM, ... */
485
srv_get_thread_type(void);
486
/*=====================*/
487
/*********************************************************************//**
488
Sets the info describing an i/o thread current state. */
491
srv_set_io_thread_op_info(
492
/*======================*/
493
ulint i, /*!< in: the 'segment' of the i/o thread */
494
const char* str); /*!< in: constant char string describing the
496
/*********************************************************************//**
497
Releases threads of the type given from suspension in the thread table.
498
NOTE! The server mutex has to be reserved by the caller!
499
@return number of threads released: this may be less than n if not
500
enough threads were suspended at the moment */
505
enum srv_thread_type type, /*!< in: thread type */
506
ulint n); /*!< in: number of threads to release */
507
/*********************************************************************//**
508
The master thread controlling the server.
509
@return a dummy parameter */
514
void* arg); /*!< in: a dummy parameter required by
516
/*******************************************************************//**
517
Wakes up the purge thread if it's not already awake. */
520
srv_wake_purge_thread(void);
521
/*=======================*/
522
/*******************************************************************//**
523
Tells the Innobase server that there has been activity in the database
524
and wakes up the master thread if it is suspended (not sleeping). Used
525
in the MySQL interface. Note that there is a small chance that the master
526
thread stays suspended (we do not protect our operation with the kernel
527
mutex, for performace reasons). */
530
srv_active_wake_master_thread(void);
531
/*===============================*/
532
/*******************************************************************//**
533
Wakes up the master thread if it is suspended or being suspended. */
536
srv_wake_master_thread(void);
537
/*========================*/
538
/*******************************************************************//**
539
Tells the purge thread that there has been activity in the database
540
and wakes up the purge thread if it is suspended (not sleeping). Note
541
that there is a small chance that the purge thread stays suspended
542
(we do not protect our operation with the kernel mutex, for
543
performace reasons). */
546
srv_wake_purge_thread_if_not_active(void);
547
/*=====================================*/
548
/*********************************************************************//**
549
Puts an OS thread to wait if there are too many concurrent threads
550
(>= srv_thread_concurrency) inside InnoDB. The threads wait in a FIFO queue. */
553
srv_conc_enter_innodb(
554
/*==================*/
555
trx_t* trx); /*!< in: transaction object associated with the
557
/*********************************************************************//**
558
This lets a thread enter InnoDB regardless of the number of threads inside
559
InnoDB. This must be called when a thread ends a lock wait. */
562
srv_conc_force_enter_innodb(
563
/*========================*/
564
trx_t* trx); /*!< in: transaction object associated with the
566
/*********************************************************************//**
567
This must be called when a thread exits InnoDB in a lock wait or at the
568
end of an SQL statement. */
571
srv_conc_force_exit_innodb(
572
/*=======================*/
573
trx_t* trx); /*!< in: transaction object associated with the
575
/*********************************************************************//**
576
This must be called when a thread exits InnoDB. */
579
srv_conc_exit_innodb(
580
/*=================*/
581
trx_t* trx); /*!< in: transaction object associated with the
583
/***************************************************************//**
584
Puts a MySQL OS thread to wait for a lock to be released. If an error
585
occurs during the wait trx->error_state associated with thr is
586
!= DB_SUCCESS when we return. DB_LOCK_WAIT_TIMEOUT and DB_DEADLOCK
587
are possible errors. DB_DEADLOCK is returned if selective deadlock
588
resolution chose this transaction as a victim. */
591
srv_suspend_mysql_thread(
592
/*=====================*/
593
que_thr_t* thr); /*!< in: query thread associated with the MySQL
595
/********************************************************************//**
596
Releases a MySQL OS thread waiting for a lock to be released, if the
597
thread is already suspended. */
600
srv_release_mysql_thread_if_suspended(
601
/*==================================*/
602
que_thr_t* thr); /*!< in: query thread associated with the
604
/*********************************************************************//**
605
A thread which wakes up threads whose lock wait may have lasted too long.
606
@return a dummy parameter */
609
srv_lock_timeout_thread(
610
/*====================*/
611
void* arg); /*!< in: a dummy parameter required by
613
/*********************************************************************//**
614
A thread which prints the info output by various InnoDB monitors.
615
@return a dummy parameter */
620
void* arg); /*!< in: a dummy parameter required by
622
/*************************************************************************
623
A thread which prints warnings about semaphore waits which have lasted
624
too long. These can be used to track bugs which cause hangs.
625
@return a dummy parameter */
628
srv_error_monitor_thread(
629
/*=====================*/
630
void* arg); /*!< in: a dummy parameter required by
632
/******************************************************************//**
633
Outputs to a file the output of the InnoDB Monitor.
634
@return FALSE if not all information printed
635
due to failure to obtain necessary mutex */
638
srv_printf_innodb_monitor(
639
/*======================*/
640
FILE* file, /*!< in: output stream */
641
ibool nowait, /*!< in: whether to wait for kernel mutex */
642
ulint* trx_start, /*!< out: file position of the start of
643
the list of active transactions */
644
ulint* trx_end); /*!< out: file position of the end of
645
the list of active transactions */
647
/******************************************************************//**
648
Function to pass InnoDB status variables to MySQL */
651
srv_export_innodb_status(void);
652
/*==========================*/
654
/******************************************************************//**
655
Increment the server activity counter. */
658
srv_inc_activity_count(void);
659
/*=========================*/
661
/*********************************************************************//**
662
Asynchronous purge thread.
663
@return a dummy parameter */
668
void* /*arg __attribute__((unused))*/); /*!< in: a dummy parameter
669
required by os_thread_create */
671
/**********************************************************************//**
672
Enqueues a task to server task queue and releases a worker thread, if there
673
is a suspended one. */
676
srv_que_task_enqueue_low(
677
/*=====================*/
678
que_thr_t* thr); /*!< in: query thread */
680
/**********************************************************************//**
681
Check whether any background thread is active.
682
@return FALSE if all are are suspended or have exited. */
685
srv_is_any_background_thread_active(void);
686
/*======================================*/
688
/** Status variables to be passed to MySQL */
689
struct export_var_struct{
690
ulint innodb_data_pending_reads; /*!< Pending reads */
691
ulint innodb_data_pending_writes; /*!< Pending writes */
692
ulint innodb_data_pending_fsyncs; /*!< Pending fsyncs */
693
ulint innodb_data_fsyncs; /*!< Number of fsyncs so far */
694
ulint innodb_data_read; /*!< Data bytes read */
695
ulint innodb_data_writes; /*!< I/O write requests */
696
ulint innodb_data_written; /*!< Data bytes written */
697
ulint innodb_data_reads; /*!< I/O read requests */
698
ulint innodb_buffer_pool_pages_total; /*!< Buffer pool size */
699
ulint innodb_buffer_pool_pages_data; /*!< Data pages */
700
ulint innodb_buffer_pool_pages_dirty; /*!< Dirty data pages */
701
ulint innodb_buffer_pool_pages_misc; /*!< Miscellanous pages */
702
ulint innodb_buffer_pool_pages_free; /*!< Free pages */
704
ulint innodb_buffer_pool_pages_latched; /*!< Latched pages */
705
#endif /* UNIV_DEBUG */
706
ulint innodb_buffer_pool_read_requests; /*!< buf_pool->stat.n_page_gets */
707
ulint innodb_buffer_pool_reads; /*!< srv_buf_pool_reads */
708
ulint innodb_buffer_pool_wait_free; /*!< srv_buf_pool_wait_free */
709
ulint innodb_buffer_pool_pages_flushed; /*!< srv_buf_pool_flushed */
710
ulint innodb_buffer_pool_write_requests;/*!< srv_buf_pool_write_requests */
711
ulint innodb_buffer_pool_read_ahead; /*!< srv_read_ahead */
712
ulint innodb_buffer_pool_read_ahead_evicted;/*!< srv_read_ahead evicted*/
713
ulint innodb_dblwr_pages_written; /*!< srv_dblwr_pages_written */
714
ulint innodb_dblwr_writes; /*!< srv_dblwr_writes */
715
ibool innodb_have_atomic_builtins; /*!< HAVE_ATOMIC_BUILTINS */
716
ulint innodb_log_waits; /*!< srv_log_waits */
717
ulint innodb_log_write_requests; /*!< srv_log_write_requests */
718
ulint innodb_log_writes; /*!< srv_log_writes */
719
ulint innodb_os_log_written; /*!< srv_os_log_written */
720
ulint innodb_os_log_fsyncs; /*!< fil_n_log_flushes */
721
ulint innodb_os_log_pending_writes; /*!< srv_os_log_pending_writes */
722
ulint innodb_os_log_pending_fsyncs; /*!< fil_n_pending_log_flushes */
723
ulint innodb_page_size; /*!< UNIV_PAGE_SIZE */
724
ulint innodb_pages_created; /*!< buf_pool->stat.n_pages_created */
725
ulint innodb_pages_read; /*!< buf_pool->stat.n_pages_read */
726
ulint innodb_pages_written; /*!< buf_pool->stat.n_pages_written */
727
ulint innodb_row_lock_waits; /*!< srv_n_lock_wait_count */
728
ulint innodb_row_lock_current_waits; /*!< srv_n_lock_wait_current_count */
729
ib_int64_t innodb_row_lock_time; /*!< srv_n_lock_wait_time
731
ulint innodb_row_lock_time_avg; /*!< srv_n_lock_wait_time
733
/ srv_n_lock_wait_count */
734
ulint innodb_row_lock_time_max; /*!< srv_n_lock_max_wait_time
736
ulint innodb_rows_read; /*!< srv_n_rows_read */
737
ulint innodb_rows_inserted; /*!< srv_n_rows_inserted */
738
ulint innodb_rows_updated; /*!< srv_n_rows_updated */
739
ulint innodb_rows_deleted; /*!< srv_n_rows_deleted */
740
ulint innodb_truncated_status_writes; /*!< srv_truncated_status_writes */
743
/** Thread slot in the thread table */
744
typedef struct srv_slot_struct srv_slot_t;
746
/** Thread table is an array of slots */
747
typedef srv_slot_t srv_table_t;
749
/** The server system struct */
750
struct srv_sys_struct{
751
srv_table_t* threads; /*!< server thread table */
752
UT_LIST_BASE_NODE_T(que_thr_t)
753
tasks; /*!< task queue */
756
extern ulint srv_n_threads_active[];
757
#else /* !UNIV_HOTBACKUP */
758
# define srv_use_adaptive_hash_indexes FALSE
759
# define srv_use_checksums TRUE
760
# define srv_use_native_aio FALSE
761
# define srv_force_recovery 0UL
762
# define srv_set_io_thread_op_info(t,info) ((void) 0)
763
# define srv_is_being_started 0
764
# define srv_win_file_flush_method SRV_WIN_IO_UNBUFFERED
765
# define srv_unix_file_flush_method SRV_UNIX_O_DSYNC
766
# define srv_start_raw_disk_in_use 0
767
# define srv_file_per_table 1
768
#endif /* !UNIV_HOTBACKUP */