Re: statistics collector

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