Tatsuo Ishii <t-ishii@sra.co.jp> writes:
> There seems no docs about statistics collector. Especially I see
> following in guc:
> #ifdef BTREE_BUILD_STATS
> #show_btree_build_stats = false
> #endif
> What is it? No conifgure option, no ifdef in pg_config.h...
That's not new stats-collector stuff, that's ancient undocumented btree
cruft (possibly dating back to Berkeley). Jan deserves blame for the
poor state of documentation of the stats collector, but not for this ;-)
What I've been able to deduce about the stats collector is documented
now in the Admin Guide...
regards, tom lane