diff options
| author | aivanov@mysql.com <> | 2006-01-18 15:20:56 +0300 |
|---|---|---|
| committer | aivanov@mysql.com <> | 2006-01-18 15:20:56 +0300 |
| commit | 5f7279d0d50b406add0bf141df6341114e8e30c9 (patch) | |
| tree | 3b690b43dc0aa84a0dd3eea5a7d5d92d804409a8 /innobase | |
| parent | af9d6bcf830e0f0fee11aa8bd9f8a447524a008f (diff) | |
| download | mariadb-git-5f7279d0d50b406add0bf141df6341114e8e30c9.tar.gz | |
Applied patch recieved from Marko:
Make innodb_thread_concurrency 0 by default, and extend the usable
range from 0 to 1000 (0 disables the thread throttling).
Diffstat (limited to 'innobase')
| -rw-r--r-- | innobase/include/srv0srv.h | 1 | ||||
| -rw-r--r-- | innobase/srv/srv0srv.c | 9 |
2 files changed, 5 insertions, 5 deletions
diff --git a/innobase/include/srv0srv.h b/innobase/include/srv0srv.h index 23c9ef1e221..f379efa98eb 100644 --- a/innobase/include/srv0srv.h +++ b/innobase/include/srv0srv.h @@ -195,7 +195,6 @@ 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 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; } |