Thread: [COMMITTERS] pgsql: Increase MAX_SYSCACHE_CALLBACKS to provide more room forextensi
[COMMITTERS] pgsql: Increase MAX_SYSCACHE_CALLBACKS to provide more room forextensi
From
Tom Lane
Date:
Increase MAX_SYSCACHE_CALLBACKS to provide more room for extensions. Increase from the historical value of 32 to 64. We are up to 31 callers of CacheRegisterSyscacheCallback() in HEAD, so if they were all to be exercised in one process that would leave only one slot for add-on modules. It's probably not possible for that to happen, but still we clearly need more daylight here. (At some point it might be worth making the array dynamically resizable; but since we've never heard a complaint of "out of syscache_callback_list slots" happening in the field, I doubt it's worth it yet.) Back-patch as far as 9.4, which is where we increased the companion limit MAX_RELCACHE_CALLBACKS (cf commit f01d1ae3a). It's not as urgent in released branches, which have only a couple dozen call sites in core, but it still seems that somebody might hit the limit before these branches die. Discussion: https://postgr.es/m/12184.1494450131@sss.pgh.pa.us Branch ------ REL9_6_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/128e133cc6e9aff086aa5247d5a921e64198f2f9 Modified Files -------------- src/backend/utils/cache/inval.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)