123
76
extern ibool srv_auto_extend_last_data_file;
124
77
extern ulint srv_last_file_size_max;
78
extern ulong srv_auto_extend_increment;
80
extern ibool srv_created_new_raw;
125
85
extern char** srv_log_group_home_dirs;
126
#ifndef UNIV_HOTBACKUP
127
extern unsigned int srv_auto_extend_increment;
129
extern ibool srv_created_new_raw;
131
87
extern ulint srv_n_log_groups;
132
88
extern ulint srv_n_log_files;
133
89
extern ulint srv_log_file_size;
134
90
extern ulint srv_log_buffer_size;
135
91
extern ulong srv_flush_log_at_trx_commit;
136
extern bool srv_adaptive_flushing;
139
93
/* The sort order table of the MySQL latin1_swedish_ci character set
141
#if defined(BUILD_DRIZZLE)
142
95
extern const byte srv_latin1_ordering[256];
143
extern bool srv_use_sys_malloc;
145
extern const byte* srv_latin1_ordering;
146
# ifndef UNIV_HOTBACKUP
147
extern my_bool srv_use_sys_malloc;
149
extern ibool srv_use_sys_malloc;
150
# endif /* UNIV_HOTBACKUP */
151
#endif /* BUILD_DRIZZLE */
152
extern ulint srv_buf_pool_size; /*!< requested size in bytes */
153
extern ulint srv_buf_pool_instances; /*!< requested number of buffer pool instances */
154
extern ulint srv_buf_pool_old_size; /*!< previously requested size */
155
extern ulint srv_buf_pool_curr_size; /*!< current size in bytes */
96
extern ulong srv_buf_pool_size; /* requested size in bytes */
97
extern ulong srv_buf_pool_old_size; /* previously requested size */
98
extern ulong srv_buf_pool_curr_size; /* current size in bytes */
156
99
extern ulint srv_mem_pool_size;
157
100
extern ulint srv_lock_table_size;
159
102
extern ulint srv_n_file_io_threads;
160
extern ulong srv_read_ahead_threshold;
161
extern ulint srv_n_read_io_threads;
162
extern ulint srv_n_write_io_threads;
164
/* Number of IO operations per second the server can do */
165
extern ulong srv_io_capacity;
166
/* Returns the number of IO operations that is X percent of the
167
capacity. PCT_IO(5) -> returns the number of IO operations that
168
is 5% of the max where max is srv_io_capacity. */
169
#define PCT_IO(p) ((ulong) (srv_io_capacity * ((double) p / 100.0)))
171
104
#ifdef UNIV_LOG_ARCHIVE
172
extern ibool srv_log_archive_on;
173
extern ibool srv_archive_recovery;
174
extern ib_uint64_t srv_archive_recovery_limit_lsn;
105
extern ibool srv_log_archive_on;
106
extern ibool srv_archive_recovery;
107
extern dulint srv_archive_recovery_limit_lsn;
175
108
#endif /* UNIV_LOG_ARCHIVE */
177
110
extern char* srv_file_flush_method_str;
311
240
buffer pool to disk */
312
241
extern ulint srv_buf_pool_flushed;
314
/** Number of buffer pool reads that led to the
243
/* variable to count the number of buffer pool reads that led to the
315
244
reading of a disk page */
316
245
extern ulint srv_buf_pool_reads;
318
/** Status variables to be passed to MySQL */
247
/* variable to count the number of sequential read-aheads were done */
248
extern ulint srv_read_ahead_seq;
250
/* variable to count the number of random read-aheads were done */
251
extern ulint srv_read_ahead_rnd;
253
/* In this structure we store status variables to be passed to MySQL */
319
254
typedef struct export_var_struct export_struc;
321
/** Status variables to be passed to MySQL */
322
256
extern export_struc export_vars;
324
/** The server system */
325
258
typedef struct srv_sys_struct srv_sys_t;
327
/** The server system */
260
/* The server system */
328
261
extern srv_sys_t* srv_sys;
330
# ifdef UNIV_PFS_THREAD
331
/* Keys to register InnoDB threads with performance schema */
332
extern mysql_pfs_key_t trx_rollback_clean_thread_key;
333
extern mysql_pfs_key_t io_handler_thread_key;
334
extern mysql_pfs_key_t srv_lock_timeout_thread_key;
335
extern mysql_pfs_key_t srv_error_monitor_thread_key;
336
extern mysql_pfs_key_t srv_monitor_thread_key;
337
extern mysql_pfs_key_t srv_master_thread_key;
339
/* This macro register the current thread and its key with performance
341
# define pfs_register_thread(key) \
344
struct PSI_thread* psi = PSI_server->new_thread(key, NULL, 0);\
346
PSI_server->set_thread(psi); \
351
/* This macro delist the current thread from performance schema */
352
# define pfs_delete_thread() \
355
PSI_server->delete_current_thread(); \
358
# endif /* UNIV_PFS_THREAD */
360
#endif /* !UNIV_HOTBACKUP */
362
/** Types of raw partitions in innodb_data_file_path */
364
SRV_NOT_RAW = 0, /*!< Not a raw partition */
365
SRV_NEW_RAW, /*!< A 'newraw' partition, only to be
367
SRV_OLD_RAW /*!< An initialized raw partition */
370
/** Alternatives for the file flush option in Unix; see the InnoDB manual
263
/* Alternatives for the file flush option in Unix; see the InnoDB manual
371
264
about what these mean */
373
SRV_UNIX_FSYNC = 1, /*!< fsync, the default */
374
SRV_UNIX_O_DSYNC, /*!< open log files in O_SYNC mode */
375
SRV_UNIX_LITTLESYNC, /*!< do not call os_file_flush()
376
when writing data files, but do flush
377
after writing to log files */
378
SRV_UNIX_NOSYNC, /*!< do not flush after writing */
379
SRV_UNIX_O_DIRECT /*!< invoke os_file_set_nocache() on
383
/** Alternatives for file i/o in Windows */
385
SRV_WIN_IO_NORMAL = 1, /*!< buffered I/O */
386
SRV_WIN_IO_UNBUFFERED /*!< unbuffered I/O; this is the default */
389
/** Alternatives for srv_force_recovery. Non-zero values are intended
265
#define SRV_UNIX_FSYNC 1 /* This is the default */
266
#define SRV_UNIX_O_DSYNC 2
267
#define SRV_UNIX_LITTLESYNC 3
268
#define SRV_UNIX_NOSYNC 4
269
#define SRV_UNIX_O_DIRECT 5
271
/* Alternatives for file i/o in Windows */
272
#define SRV_WIN_IO_NORMAL 1
273
#define SRV_WIN_IO_UNBUFFERED 2 /* This is the default */
275
/* Alternatives for srv_force_recovery. Non-zero values are intended
390
276
to help the user get a damaged database up so that he can dump intact
391
277
tables and rows with SELECT INTO OUTFILE. The database must not otherwise
392
278
be used with these options! A bigger number below means that all precautions
393
279
of lower numbers are included. */
395
SRV_FORCE_IGNORE_CORRUPT = 1, /*!< let the server run even if it
281
#define SRV_FORCE_IGNORE_CORRUPT 1 /* let the server run even if it
396
282
detects a corrupt page */
397
SRV_FORCE_NO_BACKGROUND = 2, /*!< prevent the main thread from
283
#define SRV_FORCE_NO_BACKGROUND 2 /* prevent the main thread from
398
284
running: if a crash would occur
399
285
in purge, this prevents it */
400
SRV_FORCE_NO_TRX_UNDO = 3, /*!< do not run trx rollback after
286
#define SRV_FORCE_NO_TRX_UNDO 3 /* do not run trx rollback after
402
SRV_FORCE_NO_IBUF_MERGE = 4, /*!< prevent also ibuf operations:
288
#define SRV_FORCE_NO_IBUF_MERGE 4 /* prevent also ibuf operations:
403
289
if they would cause a crash, better
405
SRV_FORCE_NO_UNDO_LOG_SCAN = 5, /*!< do not look at undo logs when
291
#define SRV_FORCE_NO_UNDO_LOG_SCAN 5 /* do not look at undo logs when
406
292
starting the database: InnoDB will
407
293
treat even incomplete transactions
409
SRV_FORCE_NO_LOG_REDO = 6 /*!< do not do the log roll-forward
295
#define SRV_FORCE_NO_LOG_REDO 6 /* do not do the log roll-forward
410
296
in connection with recovery */
413
#ifndef UNIV_HOTBACKUP
414
298
/** Types of threads existing in the system. */
415
299
enum srv_thread_type {
416
300
SRV_COM = 1, /**< threads serving communication and queries */
430
/*********************************************************************//**
431
Boots Innobase server.
432
@return DB_SUCCESS or error code */
314
/*************************************************************************
315
Boots Innobase server. */
437
/*********************************************************************//**
320
/* out: DB_SUCCESS or error code */
321
/*************************************************************************
438
322
Initializes the server. */
443
/*********************************************************************//**
444
Frees the data structures created in srv_init(). */
327
/*************************************************************************
328
Frees the OS fast mutex created in srv_boot(). */
449
/*********************************************************************//**
333
/*************************************************************************
450
334
Initializes the synchronization primitives, memory system, and the thread
451
335
local storage. */
454
338
srv_general_init(void);
455
339
/*==================*/
456
/*********************************************************************//**
457
Gets the number of threads in the system.
458
@return sum of srv_n_threads[] */
340
/*************************************************************************
341
Gets the number of threads in the system. */
461
344
srv_get_n_threads(void);
462
345
/*===================*/
463
/*********************************************************************//**
464
Returns the calling thread type.
465
@return SRV_COM, ... */
346
/*************************************************************************
347
Returns the calling thread type. */
467
349
enum srv_thread_type
468
350
srv_get_thread_type(void);
469
351
/*=====================*/
470
/*********************************************************************//**
352
/* out: SRV_COM, ... */
353
/*************************************************************************
471
354
Sets the info describing an i/o thread current state. */
474
357
srv_set_io_thread_op_info(
475
358
/*======================*/
476
ulint i, /*!< in: the 'segment' of the i/o thread */
477
const char* str); /*!< in: constant char string describing the
359
ulint i, /* in: the 'segment' of the i/o thread */
360
const char* str); /* in: constant char string describing the
479
/*********************************************************************//**
362
/*************************************************************************
480
363
Releases threads of the type given from suspension in the thread table.
481
NOTE! The server mutex has to be reserved by the caller!
482
@return number of threads released: this may be less than n if not
483
enough threads were suspended at the moment */
364
NOTE! The server mutex has to be reserved by the caller! */
486
367
srv_release_threads(
487
368
/*================*/
488
enum srv_thread_type type, /*!< in: thread type */
489
ulint n); /*!< in: number of threads to release */
490
/*********************************************************************//**
491
The master thread controlling the server.
492
@return a dummy parameter */
369
/* out: number of threads
370
released: this may be < n if
371
not enough threads were
372
suspended at the moment */
373
enum srv_thread_type type, /* in: thread type */
374
ulint n); /* in: number of threads to release */
375
/*************************************************************************
376
The master thread controlling the server. */
495
379
srv_master_thread(
496
380
/*==============*/
497
void* arg); /*!< in: a dummy parameter required by
381
/* out: a dummy parameter */
382
void* arg); /* in: a dummy parameter required by
498
383
os_thread_create */
499
/*******************************************************************//**
500
Wakes up the purge thread if it's not already awake. */
503
srv_wake_purge_thread(void);
504
/*=======================*/
505
/*******************************************************************//**
384
/***********************************************************************
506
385
Tells the Innobase server that there has been activity in the database
507
386
and wakes up the master thread if it is suspended (not sleeping). Used
508
387
in the MySQL interface. Note that there is a small chance that the master
513
392
srv_active_wake_master_thread(void);
514
393
/*===============================*/
515
/*******************************************************************//**
394
/***********************************************************************
516
395
Wakes up the master thread if it is suspended or being suspended. */
519
398
srv_wake_master_thread(void);
520
399
/*========================*/
521
/*******************************************************************//**
522
Tells the purge thread that there has been activity in the database
523
and wakes up the purge thread if it is suspended (not sleeping). Note
524
that there is a small chance that the purge thread stays suspended
525
(we do not protect our operation with the kernel mutex, for
526
performace reasons). */
529
srv_wake_purge_thread_if_not_active(void);
530
/*=====================================*/
531
/*********************************************************************//**
400
/*************************************************************************
532
401
Puts an OS thread to wait if there are too many concurrent threads
533
402
(>= srv_thread_concurrency) inside InnoDB. The threads wait in a FIFO queue. */
536
405
srv_conc_enter_innodb(
537
406
/*==================*/
538
trx_t* trx); /*!< in: transaction object associated with the
407
trx_t* trx); /* in: transaction object associated with the
540
/*********************************************************************//**
409
/*************************************************************************
541
410
This lets a thread enter InnoDB regardless of the number of threads inside
542
411
InnoDB. This must be called when a thread ends a lock wait. */
545
414
srv_conc_force_enter_innodb(
546
415
/*========================*/
547
trx_t* trx); /*!< in: transaction object associated with the
416
trx_t* trx); /* in: transaction object associated with the
549
/*********************************************************************//**
418
/*************************************************************************
550
419
This must be called when a thread exits InnoDB in a lock wait or at the
551
420
end of an SQL statement. */
554
423
srv_conc_force_exit_innodb(
555
424
/*=======================*/
556
trx_t* trx); /*!< in: transaction object associated with the
425
trx_t* trx); /* in: transaction object associated with the
558
/*********************************************************************//**
427
/*************************************************************************
559
428
This must be called when a thread exits InnoDB. */
562
431
srv_conc_exit_innodb(
563
432
/*=================*/
564
trx_t* trx); /*!< in: transaction object associated with the
433
trx_t* trx); /* in: transaction object associated with the
566
/***************************************************************//**
435
/*******************************************************************
567
436
Puts a MySQL OS thread to wait for a lock to be released. If an error
568
437
occurs during the wait trx->error_state associated with thr is
569
438
!= DB_SUCCESS when we return. DB_LOCK_WAIT_TIMEOUT and DB_DEADLOCK
574
443
srv_suspend_mysql_thread(
575
444
/*=====================*/
576
que_thr_t* thr); /*!< in: query thread associated with the MySQL
445
que_thr_t* thr); /* in: query thread associated with the MySQL
578
/********************************************************************//**
447
/************************************************************************
579
448
Releases a MySQL OS thread waiting for a lock to be released, if the
580
449
thread is already suspended. */
583
452
srv_release_mysql_thread_if_suspended(
584
453
/*==================================*/
585
que_thr_t* thr); /*!< in: query thread associated with the
454
que_thr_t* thr); /* in: query thread associated with the
586
455
MySQL OS thread */
587
/*********************************************************************//**
456
/*************************************************************************
588
457
A thread which wakes up threads whose lock wait may have lasted too long.
589
@return a dummy parameter */
592
srv_lock_timeout_thread(
593
/*====================*/
594
void* arg); /*!< in: a dummy parameter required by
596
/*********************************************************************//**
597
A thread which prints the info output by various InnoDB monitors.
598
@return a dummy parameter */
603
void* arg); /*!< in: a dummy parameter required by
458
This also prints the info output by various InnoDB monitors. */
461
srv_lock_timeout_and_monitor_thread(
462
/*================================*/
463
/* out: a dummy parameter */
464
void* arg); /* in: a dummy parameter required by
604
465
os_thread_create */
605
466
/*************************************************************************
606
467
A thread which prints warnings about semaphore waits which have lasted
607
too long. These can be used to track bugs which cause hangs.
608
@return a dummy parameter */
468
too long. These can be used to track bugs which cause hangs. */
611
471
srv_error_monitor_thread(
612
472
/*=====================*/
613
void* arg); /*!< in: a dummy parameter required by
473
/* out: a dummy parameter */
474
void* arg); /* in: a dummy parameter required by
614
475
os_thread_create */
615
/******************************************************************//**
616
Outputs to a file the output of the InnoDB Monitor.
617
@return FALSE if not all information printed
618
due to failure to obtain necessary mutex */
476
/**********************************************************************
477
Outputs to a file the output of the InnoDB Monitor. */
621
480
srv_printf_innodb_monitor(
622
481
/*======================*/
623
FILE* file, /*!< in: output stream */
624
ibool nowait, /*!< in: whether to wait for kernel mutex */
625
ulint* trx_start, /*!< out: file position of the start of
482
FILE* file, /* in: output stream */
483
ulint* trx_start, /* out: file position of the start of
626
484
the list of active transactions */
627
ulint* trx_end); /*!< out: file position of the end of
485
ulint* trx_end); /* out: file position of the end of
628
486
the list of active transactions */
630
/******************************************************************//**
488
/**********************************************************************
631
489
Function to pass InnoDB status variables to MySQL */
634
492
srv_export_innodb_status(void);
635
/*==========================*/
637
/******************************************************************//**
638
Increment the server activity counter. */
641
srv_inc_activity_count(void);
642
/*=========================*/
644
/*********************************************************************//**
645
Asynchronous purge thread.
646
@return a dummy parameter */
651
void* arg __attribute__((unused))); /*!< in: a dummy parameter
652
required by os_thread_create */
654
/**********************************************************************//**
655
Enqueues a task to server task queue and releases a worker thread, if there
656
is a suspended one. */
659
srv_que_task_enqueue_low(
660
493
/*=====================*/
661
que_thr_t* thr); /*!< in: query thread */
663
/**********************************************************************//**
664
Check whether any background thread is active.
665
@return FALSE if all are are suspended or have exited. */
668
srv_is_any_background_thread_active(void);
669
/*======================================*/
671
/** Status variables to be passed to MySQL */
672
struct export_var_struct{
673
ulint innodb_data_pending_reads; /*!< Pending reads */
674
ulint innodb_data_pending_writes; /*!< Pending writes */
675
ulint innodb_data_pending_fsyncs; /*!< Pending fsyncs */
676
ulint innodb_data_fsyncs; /*!< Number of fsyncs so far */
677
ulint innodb_data_read; /*!< Data bytes read */
678
ulint innodb_data_writes; /*!< I/O write requests */
679
ulint innodb_data_written; /*!< Data bytes written */
680
ulint innodb_data_reads; /*!< I/O read requests */
681
ulint innodb_buffer_pool_pages_total; /*!< Buffer pool size */
682
ulint innodb_buffer_pool_pages_data; /*!< Data pages */
683
ulint innodb_buffer_pool_pages_dirty; /*!< Dirty data pages */
684
ulint innodb_buffer_pool_pages_misc; /*!< Miscellanous pages */
685
ulint innodb_buffer_pool_pages_free; /*!< Free pages */
687
ulint innodb_buffer_pool_pages_latched; /*!< Latched pages */
688
#endif /* UNIV_DEBUG */
689
ulint innodb_buffer_pool_read_requests; /*!< buf_pool->stat.n_page_gets */
690
ulint innodb_buffer_pool_reads; /*!< srv_buf_pool_reads */
691
ulint innodb_buffer_pool_wait_free; /*!< srv_buf_pool_wait_free */
692
ulint innodb_buffer_pool_pages_flushed; /*!< srv_buf_pool_flushed */
693
ulint innodb_buffer_pool_write_requests;/*!< srv_buf_pool_write_requests */
694
ulint innodb_buffer_pool_read_ahead; /*!< srv_read_ahead */
695
ulint innodb_buffer_pool_read_ahead_evicted;/*!< srv_read_ahead evicted*/
696
ulint innodb_dblwr_pages_written; /*!< srv_dblwr_pages_written */
697
ulint innodb_dblwr_writes; /*!< srv_dblwr_writes */
698
ibool innodb_have_atomic_builtins; /*!< HAVE_ATOMIC_BUILTINS */
699
ulint innodb_log_waits; /*!< srv_log_waits */
700
ulint innodb_log_write_requests; /*!< srv_log_write_requests */
701
ulint innodb_log_writes; /*!< srv_log_writes */
702
ulint innodb_os_log_written; /*!< srv_os_log_written */
703
ulint innodb_os_log_fsyncs; /*!< fil_n_log_flushes */
704
ulint innodb_os_log_pending_writes; /*!< srv_os_log_pending_writes */
705
ulint innodb_os_log_pending_fsyncs; /*!< fil_n_pending_log_flushes */
706
ulint innodb_page_size; /*!< UNIV_PAGE_SIZE */
707
ulint innodb_pages_created; /*!< buf_pool->stat.n_pages_created */
708
ulint innodb_pages_read; /*!< buf_pool->stat.n_pages_read */
709
ulint innodb_pages_written; /*!< buf_pool->stat.n_pages_written */
710
ulint innodb_row_lock_waits; /*!< srv_n_lock_wait_count */
711
ulint innodb_row_lock_current_waits; /*!< srv_n_lock_wait_current_count */
712
ib_int64_t innodb_row_lock_time; /*!< srv_n_lock_wait_time
714
ulint innodb_row_lock_time_avg; /*!< srv_n_lock_wait_time
716
/ srv_n_lock_wait_count */
717
ulint innodb_row_lock_time_max; /*!< srv_n_lock_max_wait_time
719
ulint innodb_rows_read; /*!< srv_n_rows_read */
720
ulint innodb_rows_inserted; /*!< srv_n_rows_inserted */
721
ulint innodb_rows_updated; /*!< srv_n_rows_updated */
722
ulint innodb_rows_deleted; /*!< srv_n_rows_deleted */
723
ulint innodb_truncated_status_writes; /*!< srv_truncated_status_writes */
726
/** Thread slot in the thread table */
495
/* Thread slot in the thread table */
727
496
typedef struct srv_slot_struct srv_slot_t;
729
/** Thread table is an array of slots */
498
/* Thread table is an array of slots */
730
499
typedef srv_slot_t srv_table_t;
732
/** The server system struct */
501
/* In this structure we store status variables to be passed to MySQL */
502
struct export_var_struct{
503
ulint innodb_data_pending_reads;
504
ulint innodb_data_pending_writes;
505
ulint innodb_data_pending_fsyncs;
506
ulint innodb_data_fsyncs;
507
ulint innodb_data_read;
508
ulint innodb_data_writes;
509
ulint innodb_data_written;
510
ulint innodb_data_reads;
511
ulint innodb_buffer_pool_pages_total;
512
ulint innodb_buffer_pool_pages_data;
513
ulint innodb_buffer_pool_pages_dirty;
514
ulint innodb_buffer_pool_pages_misc;
515
ulint innodb_buffer_pool_pages_free;
517
ulint innodb_buffer_pool_pages_latched;
518
#endif /* UNIV_DEBUG */
519
ulint innodb_buffer_pool_read_requests;
520
ulint innodb_buffer_pool_reads;
521
ulint innodb_buffer_pool_wait_free;
522
ulint innodb_buffer_pool_pages_flushed;
523
ulint innodb_buffer_pool_write_requests;
524
ulint innodb_buffer_pool_read_ahead_seq;
525
ulint innodb_buffer_pool_read_ahead_rnd;
526
ulint innodb_dblwr_pages_written;
527
ulint innodb_dblwr_writes;
528
ulint innodb_log_waits;
529
ulint innodb_log_write_requests;
530
ulint innodb_log_writes;
531
ulint innodb_os_log_written;
532
ulint innodb_os_log_fsyncs;
533
ulint innodb_os_log_pending_writes;
534
ulint innodb_os_log_pending_fsyncs;
535
ulint innodb_page_size;
536
ulint innodb_pages_created;
537
ulint innodb_pages_read;
538
ulint innodb_pages_written;
539
ulint innodb_row_lock_waits;
540
ulint innodb_row_lock_current_waits;
541
ib_int64_t innodb_row_lock_time;
542
ulint innodb_row_lock_time_avg;
543
ulint innodb_row_lock_time_max;
544
ulint innodb_rows_read;
545
ulint innodb_rows_inserted;
546
ulint innodb_rows_updated;
547
ulint innodb_rows_deleted;
550
/* The server system struct */
733
551
struct srv_sys_struct{
734
srv_table_t* threads; /*!< server thread table */
552
srv_table_t* threads; /* server thread table */
735
553
UT_LIST_BASE_NODE_T(que_thr_t)
736
tasks; /*!< task queue */
554
tasks; /* task queue */
555
dict_index_t* dummy_ind1; /* dummy index for old-style
556
supremum and infimum records */
557
dict_index_t* dummy_ind2; /* dummy index for new-style
558
supremum and infimum records */
739
561
extern ulint srv_n_threads_active[];
740
#else /* !UNIV_HOTBACKUP */
741
# define srv_use_adaptive_hash_indexes FALSE
742
# define srv_use_checksums TRUE
743
# define srv_use_native_aio FALSE
744
# define srv_force_recovery 0UL
745
# define srv_set_io_thread_op_info(t,info) ((void) 0)
746
# define srv_is_being_started 0
747
# define srv_win_file_flush_method SRV_WIN_IO_UNBUFFERED
748
# define srv_unix_file_flush_method SRV_UNIX_O_DSYNC
749
# define srv_start_raw_disk_in_use 0
750
# define srv_file_per_table 1
751
#endif /* !UNIV_HOTBACKUP */