diff options
Diffstat (limited to 'innobase/srv')
| -rw-r--r-- | innobase/srv/srv0srv.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/innobase/srv/srv0srv.c b/innobase/srv/srv0srv.c index 694345c4142..fe9e08d65be 100644 --- a/innobase/srv/srv0srv.c +++ b/innobase/srv/srv0srv.c @@ -258,9 +258,10 @@ threads waiting for locks are not counted into the number because otherwise we could get a deadlock. MySQL creates a thread for each user session, and 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. */ +computer. Bigger computers need bigger values. Value 0 will disable the +concurrency check. */ -ulong srv_thread_concurrency = SRV_CONCURRENCY_THRESHOLD; +ulong srv_thread_concurrency = 0; ulong srv_commit_concurrency = 0; os_fast_mutex_t srv_conc_mutex; /* this mutex protects srv_conc data @@ -1141,7 +1142,7 @@ srv_conc_force_enter_innodb( trx_t* trx) /* in: transaction object associated with the thread */ { - if (srv_thread_concurrency >= SRV_CONCURRENCY_THRESHOLD) { + if (UNIV_LIKELY(!srv_thread_concurrency)) { return; } @@ -1167,7 +1168,7 @@ srv_conc_force_exit_innodb( { srv_conc_slot_t* slot = NULL; - if (srv_thread_concurrency >= SRV_CONCURRENCY_THRESHOLD) { + if (UNIV_LIKELY(!srv_thread_concurrency)) { return; } |