On Fri, Aug 6, 2010 at 11:02 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > Fujii Masao <masao.fu...@gmail.com> writes: >> The document says that the max_stack_depth is 2MB by default. >> OTOH, in the source code, the variable max_stack_depth is >> initialized with 100 (kB), and guc.c also uses 100 as the >> default. Why? > > The initial value needs to be small until we have been able to probe > rlimit and figure out what is safe.
Thanks! How about adding the comment about that as follows? *** a/src/backend/utils/misc/guc.c --- b/src/backend/utils/misc/guc.c *************** *** 1520,1525 **** static struct config_int ConfigureNamesInt[] = --- 1520,1531 ---- 16384, 1024, MAX_KILOBYTES, NULL, NULL }, + /* + * Note: the real default of max_stack_depth is calculated in + * InitializeGUCOptions(). We use 100 as the sufficiently small + * initial value until we have been able to probe rlimit and + * figure out what is safe. + */ { {"max_stack_depth", PGC_SUSET, RESOURCES_MEM, gettext_noop("Sets the maximum stack depth, in kilobytes."), Regards, -- Fujii Masao NIPPON TELEGRAPH AND TELEPHONE CORPORATION NTT Open Source Software Center -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers