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Return B_SYSTEM_BG_WORKER slots to the bgworker pool on release #74

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Return B_SYSTEM_BG_WORKER slots to the bgworker pool on release #74

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9 changes: 8 additions & 1 deletion src/backend/postmaster/pmchild.c
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Original file line number Diff line number Diff line change
Expand Up @@ -107,7 +107,6 @@ InitPostmasterChildSlots(void)
* There can be only one of each of these running at a time. They each
* get their own pool of just one entry.
*/
pmchild_pools[B_SYSTEM_BG_WORKER].size = 1;
pmchild_pools[B_AUTOVAC_LAUNCHER].size = 1;
pmchild_pools[B_SLOTSYNC_WORKER].size = 1;
pmchild_pools[B_ARCHIVER].size = 1;
Expand Down Expand Up @@ -252,6 +251,14 @@ ReleasePostmasterChildSlot(PMChild *pmchild)
/* WAL senders start out as regular backends, and share the pool */
if (pmchild->bkend_type == B_WAL_SENDER)
pool = &pmchild_pools[B_BACKEND];

/*
* System background workers are allocated from the regular bgworker
* pool and retyped in do_start_bgworker(), so their slots must be
* returned to that pool.
*/
else if (pmchild->bkend_type == B_SYSTEM_BG_WORKER)
pool = &pmchild_pools[B_BG_WORKER];
else
pool = &pmchild_pools[pmchild->bkend_type];

Expand Down