I am evaluating this SunFire T2000 as a replacement for an Intel P3 1Ghz postgresql server. This intel server runs a retail reporting database on postgresql 8.1.3. I need to realize significant performance gains on T2000 server to justify the expense. So I need to tune the postgresql server as much as I can for it. Right now the operating system (solaris 10) sees each thread as a single cpu and only allows each thread 4.16% of the available cpu resources for processing queries. Since postgresql is not multithreaded and since I cannot apparently break past the operating system imposed limits on a single thread I can't fully realize the performance benefits of the T2000 server unless and until I start getting lots of people hitting the database server with requests. This doesn't happen right now. It may happen later on as I write more applications for the server but I am looking to see if the performance benefit we can get from this server is worth the price tag right now. That is why I am looking for ways to tweak postgres on it. Thanks, Juan -----Original Message----- From: Josh Berkus [mailto:josh@xxxxxxxxxxxx] Sent: Wednesday, April 05, 2006 6:02 PM To: pgsql-performance@xxxxxxxxxxxxxx Cc: Juan Casero (FL FLC); Luke Lonergan Subject: Re: [PERFORM] Sun Fire T2000 and PostgreSQL 8.1.3 Juan, > When I hit > this pgsql on this laptop with a large query I can see the load spike > up really high on both of my virtual processors. Whatever, pgsql is > doing it looks like both cpu's are being used indepently. Nope, sorry, you're being decieved. Postgres is strictly one process, one query. You can use Bizgres MPP to achieve multithreading; it's proprietary and you have to pay for it. It does work well, though. More importantly, though, you haven't really explained why you care about multithreading. -- --Josh Josh Berkus Aglio Database Solutions San Francisco
