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MDEV-5205 - MariaDB does not start if more than 128 cpu's are available

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- thread_pool_size command line option upper limit increased to 100 000
  (same as for max_connections)
- thread_pool_size system variable upper limit is maximum of 128 or
  the value given at command line
- thread groups are now allocated dynamically

Different limit for command line option and system variable was done to
avoid additional mutex for all_groups and threadpool_max_size.
This commit is contained in:
Sergey Vojtovich
2013-11-05 09:18:59 +04:00
parent 52dea41052
commit fd9f1638ea
10 changed files with 64 additions and 9 deletions
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3
sql/threadpool.h
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@ -13,12 +13,13 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#define MAX_THREAD_GROUPS 128
#define MAX_THREAD_GROUPS 100000
/* Threadpool parameters */
extern uint threadpool_min_threads; /* Minimum threads in pool */
extern uint threadpool_idle_timeout; /* Shutdown idle worker threads after this timeout */
extern uint threadpool_size; /* Number of parallel executing threads */
extern uint threadpool_max_size;
extern uint threadpool_stall_limit; /* time interval in 10 ms units for stall checks*/
extern uint threadpool_max_threads; /* Maximum threads in pool */
extern uint threadpool_oversubscribe; /* Maximum active threads in group */