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Add max_parallel_workers GUC.

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Increase the default value of the existing max_worker_processes GUC
from 8 to 16, and add a new max_parallel_workers GUC with a maximum
of 8.  This way, even if the maximum amount of parallel query is
happening, there is still room for background workers that do other
things, as originally envisioned when max_worker_processes was added.

Julien Rouhaud, reviewed by Amit Kapila and by revised by me.
This commit is contained in:
Robert Haas
2016-12-02 07:42:58 -05:00
parent 5714931b07
commit b460f5d669
9 changed files with 93 additions and 10 deletions
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src/include/miscadmin.h
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@ -157,6 +157,7 @@ extern PGDLLIMPORT int NBuffers;
extern int MaxBackends;
extern int MaxConnections;
extern int max_worker_processes;
extern int max_parallel_workers;
extern PGDLLIMPORT int MyProcPid;
extern PGDLLIMPORT pg_time_t MyStartTime;