On Tue, 21 Mar 2006, Daniel Caune wrote:
For example, the execution of the following query is fast as it used to
be (gslog_event_id is the primary key on gslog_event):
select max(gslog_event_id) from gslog_event; (=> Time: 0.773 ms)
while the following query is really slow (several minutes):
select min(gslog_event_id) from gslog_event; (index on the primary key
is taken)
I'm not a hardware expert at all, but I supposed that the whole
performance would be degraded when a problem occurs with RAID disks. Am
I wrong? Could it be something else? Are there some tools that check
the state of a PostgreSQL database?
You would be correct, a hardware problem should manifest itself on both those
queries. What is the explain analyze output of those two queries? It's
possible you have a corrupt index on gslog_event. If that's the case, a
reindex would likely remedy the problem. Is postgres logging any errors?
--
Jeff Frost, Owner <[EMAIL PROTECTED]>
Frost Consulting, LLC http://www.frostconsultingllc.com/
Phone: 650-780-7908 FAX: 650-649-1954
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