Hi!
> > Does that mean only the xlog, or also the clog? As far as I understand, the
> > clog contains some meta-information on the xlog, so presumably it is
> > flushed to disc synchronously together with the xlog? That would mean that
> > they each need a separate disk to prevent one disk having
Tom Lane writes:
> Mario Splivalo writes:
>> Now I'm confused, why is 'sql' function much slower than 'direct' SELECT?
>
> Usually the reason for this is that the planner chooses a different plan
> when it has knowledge of the particular value you are searching for than
> when it does not. I su
Hi list,
Clustering my indexes dramatically improves the query performance of many of
my queries. Also, the actual clustering takes a very long time for big
databases, roughly 20 hours. I have two questions about how to improve this:
1. I've tweaked maintenance_mem_max and effective_cache_size to
2PM -0500, Harold A. Gim?nez Ch. wrote:
> > Hi list,
> >
> > Clustering my indexes dramatically improves the query performance of many
> of
> > my queries. Also, the actual clustering takes a very long time for big
> > databases, roughly 20 hours. I have two q
