diff options
| -rw-r--r-- | innobase/include/srv0srv.h | 1 | ||||
| -rw-r--r-- | innobase/srv/srv0srv.c | 17 | ||||
| -rw-r--r-- | sql/ha_innodb.cc | 4 |
3 files changed, 6 insertions, 16 deletions
diff --git a/innobase/include/srv0srv.h b/innobase/include/srv0srv.h index 6e4241965c1..116ae7b6438 100644 --- a/innobase/include/srv0srv.h +++ b/innobase/include/srv0srv.h @@ -182,6 +182,7 @@ extern mutex_t* kernel_mutex_temp;/* mutex protecting the server, trx structs, #define kernel_mutex (*kernel_mutex_temp) #define SRV_MAX_N_IO_THREADS 100 +#define SRV_CONCURRENCY_THRESHOLD 20 /* Array of English strings describing the current state of an i/o handler thread */ diff --git a/innobase/srv/srv0srv.c b/innobase/srv/srv0srv.c index f901425a5f9..837c5be2bb6 100644 --- a/innobase/srv/srv0srv.c +++ b/innobase/srv/srv0srv.c @@ -260,7 +260,7 @@ semaphore contention and convoy problems can occur withput this restriction. Value 10 should be good if there are less than 4 processors + 4 disks in the computer. Bigger computers need bigger values. */ -ulong srv_thread_concurrency = 8; +ulong srv_thread_concurrency = SRV_CONCURRENCY_THRESHOLD; os_fast_mutex_t srv_conc_mutex; /* this mutex protects srv_conc data structures */ @@ -983,12 +983,6 @@ srv_conc_enter_innodb( srv_conc_slot_t* slot = NULL; ulint i; - if (srv_thread_concurrency >= 500) { - /* Disable the concurrency check */ - - return; - } - /* If trx has 'free tickets' to enter the engine left, then use one such ticket */ @@ -1134,7 +1128,7 @@ srv_conc_force_enter_innodb( trx_t* trx) /* in: transaction object associated with the thread */ { - if (srv_thread_concurrency >= 500) { + if (srv_thread_concurrency >= SRV_CONCURRENCY_THRESHOLD) { return; } @@ -1160,7 +1154,7 @@ srv_conc_force_exit_innodb( { srv_conc_slot_t* slot = NULL; - if (srv_thread_concurrency >= 500) { + if (srv_thread_concurrency >= SRV_CONCURRENCY_THRESHOLD) { return; } @@ -1212,11 +1206,6 @@ srv_conc_exit_innodb( trx_t* trx) /* in: transaction object associated with the thread */ { - if (srv_thread_concurrency >= 500) { - - return; - } - if (trx->n_tickets_to_enter_innodb > 0) { /* We will pretend the thread is still inside InnoDB though it now leaves the InnoDB engine. In this way we save diff --git a/sql/ha_innodb.cc b/sql/ha_innodb.cc index 8218e4fecc0..e33a0939e27 100644 --- a/sql/ha_innodb.cc +++ b/sql/ha_innodb.cc @@ -326,7 +326,7 @@ innodb_srv_conc_enter_innodb( /*=========================*/ trx_t* trx) /* in: transaction handle */ { - if (UNIV_LIKELY(srv_thread_concurrency >= 20)) { + if (UNIV_LIKELY(srv_thread_concurrency >= SRV_CONCURRENCY_THRESHOLD)) { return; } @@ -343,7 +343,7 @@ innodb_srv_conc_exit_innodb( /*========================*/ trx_t* trx) /* in: transaction handle */ { - if (UNIV_LIKELY(srv_thread_concurrency >= 20)) { + if (UNIV_LIKELY(srv_thread_concurrency >= SRV_CONCURRENCY_THRESHOLD)) { return; } |