| From: | "Guillaume Smet" <guillaume(dot)smet(at)gmail(dot)com> |
|---|---|
| To: | Jérôme BENOIS <benois(at)argia-engineering(dot)fr> |
| Cc: | "Scott Marlowe" <smarlowe(at)g2switchworks(dot)com>, "Dave Dutcher" <dave(at)tridecap(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: High CPU Load |
| Date: | 2006-09-14 21:22:48 |
| Message-ID: | 1d4e0c10609141422o57ecf28eobf3d0b7594bb242f@mail.gmail.com |
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| Lists: | pgsql-performance |
Jérôme,
Perhaps it's a stupid question but are your queries slower than
before? You didn't tell it.
IMHO, it's not a problem to have a high load if you have a lot of
users and your queries are fast (and with 8.1, they should be far
faster than before).
To take a real example, we had a problem with a quad xeon running
postgres 7.4 and even when there were a lot of queries, the load was
always lower than 4 and suddenly the queries were really slow and the
database was completely unusable.
When we upgraded to 8.1, on very high load, we had a far higher cpu
load but queries were far faster even with a high cpu load.
Considering your top output, I suspect you use HT and you should
really remove it if it's the case.
--
Guillaume
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