Re: [PERFORM] Partitioned tables - planner wont use indexes

2008-04-04 Thread paul rivers
kevin kempter wrote: Hi List; Sorry if this is a dupe, my first post never showed up... I'm having some performance issues with a partitioned table. We have a VERY large table that we've partitioned by day. Unfortunately, that is the defined behavior in this case. From 5.9.6 of the manual

Re: [PERFORM] Planning hot/live backups?

2008-03-24 Thread paul rivers
Matthew T. O'Connor wrote: Steve Poe wrote: The owners of the animal hospital where I work at want to consider live/hot backups through out the day so we're less likely to lose a whole day of transaction. We use Postgresql 8.0.15. We do 3AM backups, using pg_dumpall, to a file when there is v

Re: [PERFORM] count * performance issue

2008-03-07 Thread paul rivers
Mark Mielke wrote: Josh Berkus wrote: Count() on Oracle and MySQL is almost instantaneous, even for very large tables. So why can't Postgres do what they do? AFAIK the above claim is false for Oracle. They have the same transactional issues we do. Nope. Oracle's MVCC is implemen

Re: [PERFORM] count * performance issue

2008-03-06 Thread paul rivers
Craig James wrote: Tom Lane wrote: Craig James <[EMAIL PROTECTED]> writes: Count() on Oracle and MySQL is almost instantaneous, even for very large tables. So why can't Postgres do what they do? AFAIK the above claim is false for Oracle. They have the same transactional issues we do. My ex