Re: 8.2 is 30% better in pgbench than 8.3

Hello,

I checked my tests again I have different results. Now I tested
PostgreSQL on dedicated server. Now 8.3 is about 20% faster. I didn't
see strong  impression of autovacuum.  All numbers are approximate
only. I did pgbench 3x for folowing configuration: (autovacuum on,
autovacuum off, statistics off) and for -tntransaction (100, 1000,
4000)

-t 100   629/638/639 630/630/646 581/654/656 -- 8.3           443/519/519 542/555/566  670/692/694 -- 8.2

-t 1000 622/626/653 630/635/653 631/631/652 -- 8.3           523/528/541 522/535/550 679/681/690 -- 8.2

-t 4000 632/635/644 248/385/651* 191/401/641* -- 8.3           465/472/520 237/336/538*  249/379/702* -- 8.2

8.2 is faster only if statistics are off


Note:
*I didn't use parametr v (do_vacuum_accounts)

I am sorry for noise

Regards
Pavel Stehule