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_4_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/5c633f76baa9e315840db44666bc026c4f1ed099 Modified Files -------------- src/backend/utils/cache/inval.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)