On Fri, Apr 30, 2010 at 9:02 PM, Greg Smith <greg@xxxxxxxxxxxxxxx> wrote: > Joshua D. Drake wrote: >> >> On Fri, 2010-04-30 at 13:42 -0700, Gauthier, Dave wrote: >> >>>>> >>>>> If I had to plan server deployments for the next year (and I do) I'd >>>>> be sticking with pg 8.3 and a proven replication engine. Next summer >>>>> >>>> >>>> Surely you mean 8.4? :-) >>>> >> >> No, I would buy the 8.3 argument as well. Depending on your conservative >> level. 8.4 is fine and all but 8.3 is about as rock solid as it gets. > > Unless you don't vacuum enough on a bigger database, run out of FSM pages, > and the whole vacuum strategy goes to hell afterwards. I would say that > running into that issue is *probable* for an 8.3 install of any significant > size, whereas the odds of running into a regression in 8.4 relative to 8.3 > is pretty low. The whole "the older version is always more reliable" mantra > doesn't make sense when you've got a major known issue in the older release > that just goes away by using the newer one, and I feel that's the case with > 8.4 vs. 8.3. Exactly. I've got a LOT of effort involved in free space map sizing and monitoring on 8.3. However, for me it's no longer a serious problem. Free space map is 10 to 20x what it needs to be on my machines now and works like a charm in 8.3. 8.4 randomly crashed, and honestly I can't afford to test and help fix it right now. This summer I can and will either with 9.0 or 8.4. But we're talking db crashes that were happening once every 2 to 3 weeks for me, so testing it takes a lot of time for me. And I can't do it with my productions servers. I tested 8.4 what I thought was fairly hardly last year only to have 8.4.1 die under the same load that 8.3 handled without a problem, and reverted to the known working version putting testing 8.4.1 on hold. So to ME, the choice is a fully functional 8.3 installation that has NO problems with free space map because of configuration choices, or an 8.4 with a known (to me) issue of crashing and dying. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
