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PGPRO-7151: Fix the get_max_procs_count() function. #61

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PGPRO-7151: Fix the get_max_procs_count() function. #61

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25 changes: 12 additions & 13 deletions pg_wait_sampling.c
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Original file line number Diff line number Diff line change
Expand Up @@ -89,7 +89,7 @@ get_max_procs_count(void)
*/
Assert(MaxBackends > 0);
count += MaxBackends;
#else
#elif PG_VERSION_NUM >= 120000
/*
* On older versions, we need to compute MaxBackends: bgworkers, autovacuum
* workers and launcher.
Expand All @@ -110,23 +110,22 @@ get_max_procs_count(void)
* fail (and prevent postgres startup) due to an out of shared memory
* error.
*/
count += MaxConnections + autovacuum_max_workers + 1
+ max_worker_processes;

#if PG_VERSION_NUM >= 140000 && defined(PGPRO_EE)
count += MaxATX;
#endif

count += MaxConnections + autovacuum_max_workers + 1 +
max_worker_processes + max_wal_senders;
#else /* pg 12- */
/*
* Starting with pg12, wal senders aren't part of MaxConnections anymore
* and have to be accounted for.
* On versions before pg12, wal senders are the part of MaxConnections
* and doesn't have to be accounted for.
*/
#if PG_VERSION_NUM >= 120000
count += max_wal_senders;
#endif /* pg 12+ */
count += MaxConnections + autovacuum_max_workers + 1 +
max_worker_processes;
#endif /* pg 15- */
/* End of MaxBackends calculation. */

#if PG_VERSION_NUM >= 140000 && defined(PGPRO_EE)
count += MaxATX;
#endif

/* Add AuxiliaryProcs */
count += NUM_AUXILIARY_PROCS;

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