1
by brian
clean slate |
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/******************************************************
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The server main program
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(c) 1995 Innobase Oy
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Created 10/10/1995 Heikki Tuuri
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*******************************************************/
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#ifndef srv0srv_h
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#define srv0srv_h
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#include "univ.i" |
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#include "sync0sync.h" |
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#include "os0sync.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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extern const char srv_mysql50_table_name_prefix[9]; |
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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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/* If the last data file is auto-extended, we add this many pages to it
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at a time */
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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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extern ibool srv_file_per_table; |
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extern ibool srv_locks_unsafe_for_binlog; |
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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 ulong srv_auto_extend_increment; |
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extern ibool srv_created_new_raw; |
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#define SRV_NEW_RAW 1
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#define SRV_OLD_RAW 2
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extern char** srv_log_group_home_dirs; |
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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 byte srv_latin1_ordering[256];/* The sort order table of the latin1 |
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character set */
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extern ulint srv_pool_size; |
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extern ulint srv_awe_window_size; |
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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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#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 dulint srv_archive_recovery_limit_lsn; |
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#endif /* UNIV_LOG_ARCHIVE */ |
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extern ulint srv_lock_wait_timeout; |
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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 ulong srv_commit_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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transactions). */
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extern ibool srv_innodb_status; |
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extern ibool srv_stats_on_metadata; |
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extern ibool srv_use_doublewrite_buf; |
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extern ibool srv_use_checksums; |
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extern ibool srv_set_thread_priorities; |
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extern int srv_query_thread_priority; |
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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 ibool srv_use_awe; |
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extern ibool srv_use_adaptive_hash_indexes; |
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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_and_monitor_active; |
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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; |
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extern ulong srv_thread_sleep_delay; |
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extern ulint srv_spin_wait_delay; |
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extern ibool srv_priority_boost; |
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extern ulint srv_pool_size; |
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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 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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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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#define kernel_mutex (*kernel_mutex_temp)
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#define SRV_MAX_N_IO_THREADS 100
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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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/* 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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was flushed */
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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. */
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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 */
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extern ulint srv_buf_pool_flushed; |
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/* variable to count the number of buffer pool reads that led to the
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reading of a disk page */
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extern ulint srv_buf_pool_reads; |
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/* variable to count the number of sequential read-aheads were done */
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extern ulint srv_read_ahead_seq; |
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/* variable to count the number of random read-aheads were done */
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extern ulint srv_read_ahead_rnd; |
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/* In this structure we store status variables to be passed to MySQL */
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typedef struct export_var_struct export_struc; |
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extern export_struc export_vars; |
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typedef struct srv_sys_struct srv_sys_t; |
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/* The server system */
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extern srv_sys_t* srv_sys; |
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/* Alternatives for the file flush option in Unix; see the InnoDB manual
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about what these mean */
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#define SRV_UNIX_FSYNC 1 /* This is the default */ |
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#define SRV_UNIX_O_DSYNC 2
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#define SRV_UNIX_LITTLESYNC 3
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#define SRV_UNIX_NOSYNC 4
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#define SRV_UNIX_O_DIRECT 5
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/* Alternatives for file i/o in Windows */
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#define SRV_WIN_IO_NORMAL 1
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#define SRV_WIN_IO_UNBUFFERED 2 /* This is the default */ |
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/* Alternatives for srv_force_recovery. Non-zero values are intended
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to help the user get a damaged database up so that he can dump intact
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tables and rows with SELECT INTO OUTFILE. The database must not otherwise
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be used with these options! A bigger number below means that all precautions
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of lower numbers are included. */
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#define SRV_FORCE_IGNORE_CORRUPT 1 /* let the server run even if it |
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detects a corrupt page */
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#define SRV_FORCE_NO_BACKGROUND 2 /* prevent the main thread from |
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running: if a crash would occur
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in purge, this prevents it */
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#define SRV_FORCE_NO_TRX_UNDO 3 /* do not run trx rollback after |
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recovery */
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#define SRV_FORCE_NO_IBUF_MERGE 4 /* prevent also ibuf operations: |
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if they would cause a crash, better
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not do them */
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#define SRV_FORCE_NO_UNDO_LOG_SCAN 5 /* do not look at undo logs when |
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starting the database: InnoDB will
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treat even incomplete transactions
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as committed */
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#define SRV_FORCE_NO_LOG_REDO 6 /* do not do the log roll-forward |
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in connection with recovery */
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/*************************************************************************
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Boots Innobase server. */
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ulint
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srv_boot(void); |
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/*==========*/
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/* out: DB_SUCCESS or error code */
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/*************************************************************************
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Initializes the server. */
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void
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srv_init(void); |
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/*==========*/
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/*************************************************************************
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Frees the OS fast mutex created in srv_boot(). */
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void
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srv_free(void); |
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/*==========*/
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/*************************************************************************
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Initializes the synchronization primitives, memory system, and the thread
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local storage. */
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void
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srv_general_init(void); |
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/*==================*/
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/*************************************************************************
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Gets the number of threads in the system. */
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ulint
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srv_get_n_threads(void); |
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/*===================*/
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/*************************************************************************
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Returns the calling thread type. */
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ulint
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srv_get_thread_type(void); |
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/*=====================*/
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/* out: SRV_COM, ... */
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/*************************************************************************
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Sets the info describing an i/o thread current state. */
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void
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srv_set_io_thread_op_info( |
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/*======================*/
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ulint i, /* in: the 'segment' of the i/o thread */ |
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const char* str); /* in: constant char string describing the |
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state */
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/*************************************************************************
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Releases threads of the type given from suspension in the thread table.
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NOTE! The server mutex has to be reserved by the caller! */
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ulint
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srv_release_threads( |
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/*================*/
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/* out: number of threads released: this may be
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< n if not enough threads were suspended at the
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moment */
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ulint type, /* in: thread type */ |
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ulint n); /* in: number of threads to release */ |
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/*************************************************************************
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The master thread controlling the server. */
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os_thread_ret_t
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srv_master_thread( |
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/*==============*/
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/* out: a dummy parameter */
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void* arg); /* in: a dummy parameter required by |
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os_thread_create */
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/***********************************************************************
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Tells the Innobase server that there has been activity in the database
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and wakes up the master thread if it is suspended (not sleeping). Used
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in the MySQL interface. Note that there is a small chance that the master
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thread stays suspended (we do not protect our operation with the kernel
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mutex, for performace reasons). */
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void
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srv_active_wake_master_thread(void); |
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/*===============================*/
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/***********************************************************************
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Wakes up the master thread if it is suspended or being suspended. */
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void
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srv_wake_master_thread(void); |
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/*========================*/
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/*************************************************************************
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Puts an OS thread to wait if there are too many concurrent threads
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(>= srv_thread_concurrency) inside InnoDB. The threads wait in a FIFO queue. */
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void
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srv_conc_enter_innodb( |
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/*==================*/
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trx_t* trx); /* in: transaction object associated with the |
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thread */
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/*************************************************************************
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This lets a thread enter InnoDB regardless of the number of threads inside
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InnoDB. This must be called when a thread ends a lock wait. */
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void
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srv_conc_force_enter_innodb( |
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/*========================*/
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trx_t* trx); /* in: transaction object associated with the |
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thread */
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/*************************************************************************
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This must be called when a thread exits InnoDB in a lock wait or at the
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end of an SQL statement. */
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void
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srv_conc_force_exit_innodb( |
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/*=======================*/
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trx_t* trx); /* in: transaction object associated with the |
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thread */
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/*************************************************************************
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This must be called when a thread exits InnoDB. */
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void
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srv_conc_exit_innodb( |
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/*=================*/
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trx_t* trx); /* in: transaction object associated with the |
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thread */
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/*******************************************************************
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Puts a MySQL OS thread to wait for a lock to be released. If an error
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occurs during the wait trx->error_state associated with thr is
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!= DB_SUCCESS when we return. DB_LOCK_WAIT_TIMEOUT and DB_DEADLOCK
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are possible errors. DB_DEADLOCK is returned if selective deadlock
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resolution chose this transaction as a victim. */
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void
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srv_suspend_mysql_thread( |
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/*=====================*/
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que_thr_t* thr); /* in: query thread associated with the MySQL |
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OS thread */
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/************************************************************************
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Releases a MySQL OS thread waiting for a lock to be released, if the
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thread is already suspended. */
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void
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srv_release_mysql_thread_if_suspended( |
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/*==================================*/
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que_thr_t* thr); /* in: query thread associated with the |
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MySQL OS thread */
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/*************************************************************************
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A thread which wakes up threads whose lock wait may have lasted too long.
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This also prints the info output by various InnoDB monitors. */
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430 |
os_thread_ret_t
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431 |
srv_lock_timeout_and_monitor_thread( |
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432 |
/*================================*/
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433 |
/* out: a dummy parameter */
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434 |
void* arg); /* in: a dummy parameter required by |
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435 |
os_thread_create */
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436 |
/*************************************************************************
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437 |
A thread which prints warnings about semaphore waits which have lasted
|
|
438 |
too long. These can be used to track bugs which cause hangs. */
|
|
439 |
||
440 |
os_thread_ret_t
|
|
441 |
srv_error_monitor_thread( |
|
442 |
/*=====================*/
|
|
443 |
/* out: a dummy parameter */
|
|
444 |
void* arg); /* in: a dummy parameter required by |
|
445 |
os_thread_create */
|
|
446 |
/**********************************************************************
|
|
447 |
Outputs to a file the output of the InnoDB Monitor. */
|
|
448 |
||
449 |
void
|
|
450 |
srv_printf_innodb_monitor( |
|
451 |
/*======================*/
|
|
452 |
FILE* file, /* in: output stream */ |
|
453 |
ulint* trx_start, /* out: file position of the start of |
|
454 |
the list of active transactions */
|
|
455 |
ulint* trx_end); /* out: file position of the end of |
|
456 |
the list of active transactions */
|
|
457 |
||
458 |
/**********************************************************************
|
|
459 |
Function to pass InnoDB status variables to MySQL */
|
|
460 |
||
461 |
void
|
|
462 |
srv_export_innodb_status(void); |
|
463 |
/*=====================*/
|
|
464 |
||
465 |
/* Types for the threads existing in the system. Threads of types 4 - 9
|
|
466 |
are called utility threads. Note that utility threads are mainly disk
|
|
467 |
bound, except that version threads 6 - 7 may also be CPU bound, if
|
|
468 |
cleaning versions from the buffer pool. */
|
|
469 |
||
470 |
#define SRV_COM 1 /* threads serving communication and queries */ |
|
471 |
#define SRV_CONSOLE 2 /* thread serving console */ |
|
472 |
#define SRV_WORKER 3 /* threads serving parallelized queries and |
|
473 |
queries released from lock wait */
|
|
474 |
#define SRV_BUFFER 4 /* thread flushing dirty buffer blocks, |
|
475 |
not currently in use */
|
|
476 |
#define SRV_RECOVERY 5 /* threads finishing a recovery, |
|
477 |
not currently in use */
|
|
478 |
#define SRV_INSERT 6 /* thread flushing the insert buffer to disk, |
|
479 |
not currently in use */
|
|
480 |
#define SRV_MASTER 7 /* the master thread, (whose type number must |
|
481 |
be biggest) */
|
|
482 |
||
483 |
/* Thread slot in the thread table */
|
|
484 |
typedef struct srv_slot_struct srv_slot_t; |
|
485 |
||
486 |
/* Thread table is an array of slots */
|
|
487 |
typedef srv_slot_t srv_table_t; |
|
488 |
||
489 |
/* In this structure we store status variables to be passed to MySQL */
|
|
490 |
struct export_var_struct{ |
|
491 |
ulint innodb_data_pending_reads; |
|
492 |
ulint innodb_data_pending_writes; |
|
493 |
ulint innodb_data_pending_fsyncs; |
|
494 |
ulint innodb_data_fsyncs; |
|
495 |
ulint innodb_data_read; |
|
496 |
ulint innodb_data_writes; |
|
497 |
ulint innodb_data_written; |
|
498 |
ulint innodb_data_reads; |
|
499 |
ulint innodb_buffer_pool_pages_total; |
|
500 |
ulint innodb_buffer_pool_pages_data; |
|
501 |
ulint innodb_buffer_pool_pages_dirty; |
|
502 |
ulint innodb_buffer_pool_pages_misc; |
|
503 |
ulint innodb_buffer_pool_pages_free; |
|
504 |
ulint innodb_buffer_pool_pages_latched; |
|
505 |
ulint innodb_buffer_pool_read_requests; |
|
506 |
ulint innodb_buffer_pool_reads; |
|
507 |
ulint innodb_buffer_pool_wait_free; |
|
508 |
ulint innodb_buffer_pool_pages_flushed; |
|
509 |
ulint innodb_buffer_pool_write_requests; |
|
510 |
ulint innodb_buffer_pool_read_ahead_seq; |
|
511 |
ulint innodb_buffer_pool_read_ahead_rnd; |
|
512 |
ulint innodb_dblwr_pages_written; |
|
513 |
ulint innodb_dblwr_writes; |
|
514 |
ulint innodb_log_waits; |
|
515 |
ulint innodb_log_write_requests; |
|
516 |
ulint innodb_log_writes; |
|
517 |
ulint innodb_os_log_written; |
|
518 |
ulint innodb_os_log_fsyncs; |
|
519 |
ulint innodb_os_log_pending_writes; |
|
520 |
ulint innodb_os_log_pending_fsyncs; |
|
521 |
ulint innodb_page_size; |
|
522 |
ulint innodb_pages_created; |
|
523 |
ulint innodb_pages_read; |
|
524 |
ulint innodb_pages_written; |
|
525 |
ulint innodb_row_lock_waits; |
|
526 |
ulint innodb_row_lock_current_waits; |
|
527 |
ib_longlong innodb_row_lock_time; |
|
528 |
ulint innodb_row_lock_time_avg; |
|
529 |
ulint innodb_row_lock_time_max; |
|
530 |
ulint innodb_rows_read; |
|
531 |
ulint innodb_rows_inserted; |
|
532 |
ulint innodb_rows_updated; |
|
533 |
ulint innodb_rows_deleted; |
|
534 |
};
|
|
535 |
||
536 |
/* The server system struct */
|
|
537 |
struct srv_sys_struct{ |
|
538 |
srv_table_t* threads; /* server thread table */ |
|
539 |
UT_LIST_BASE_NODE_T(que_thr_t) |
|
540 |
tasks; /* task queue */ |
|
541 |
dict_index_t* dummy_ind1; /* dummy index for old-style |
|
542 |
supremum and infimum records */
|
|
543 |
dict_index_t* dummy_ind2; /* dummy index for new-style |
|
544 |
supremum and infimum records */
|
|
545 |
};
|
|
546 |
||
547 |
extern ulint srv_n_threads_active[]; |
|
548 |
||
549 |
#endif
|
|
550 |