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MDEV-19312 Make throttling interval depend on thread_pool_stall_limit

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A thread_pool_stall_limit which is smaller than default would result
in quicker creation of threads.
This commit is contained in:
Vladislav Vaintroub
2019-05-31 08:28:22 +00:00
parent 28fad39de7
commit daeaa600ef
6 changed files with 16 additions and 14 deletions
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20
sql/threadpool_generic.cc
View File

@ -28,6 +28,7 @@
#include <time.h>
#include <sql_plist.h>
#include <threadpool.h>
#include <algorithm>
#ifdef HAVE_IOCP
#define OPTIONAL_IO_POLL_READ_PARAM this
@ -865,23 +866,24 @@ end:
The actual values were not calculated using any scientific methods.
They just look right, and behave well in practice.
TODO: Should throttling depend on thread_pool_stall_limit?
*/
#define THROTTLING_FACTOR (threadpool_stall_limit/std::max(DEFAULT_THREADPOOL_STALL_LIMIT,threadpool_stall_limit))
static ulonglong microsecond_throttling_interval(thread_group_t *thread_group)
{
int count= thread_group->thread_count;
if (count < 4)
if (count < 1+ (int)threadpool_oversubscribe)
return 0;
if (count < 8)
return 50*1000;
return 50*1000*THROTTLING_FACTOR;
if(count < 16)
return 100*1000;
return 200*1000;
return 100*1000*THROTTLING_FACTOR;
return 200*100*THROTTLING_FACTOR;
}