"Guillaume Smet" <[EMAIL PROTECTED]> writes: > On Nov 24, 2007 5:16 PM, Gregory Stark <[EMAIL PROTECTED]> wrote: >> Several of the major changes in 8.3 are I/O vs CPU tradeoffs which could be >> causing a slowdown if you're measuring primarily CPU resources. I'm thinking >> of both HOT and packed varlenas. I don't know if either of these are causing >> your slowdown but it's possible. > > Here are some rough results: > http://people.openwide.fr/~gsmet/postgresql/postgresql_8.3_development_cycle_1.png > > I don't pretend that this bench is realistic but it's a first step. I > run the tests with weird numbers more than 3 times to check that they > are consistent. > > IIRC, packed varlenas were commited during April and HOT at the end of > September.
Hm, so your test seems to be showing up a difference due to packed varlena? What functions or operators are you using? Could you send the schema and actual queries? -- Gregory Stark EnterpriseDB http://www.enterprisedb.com Get trained by Bruce Momjian - ask me about EnterpriseDB's PostgreSQL training! ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
