On Apr 2, 2006, at 6:30 PM, Josh Berkus wrote:
But just as a follow up question to your #1 suggestion, I have 8 GB
of ram in my production server. You're saying to set the
effective_cache_size then to 5 GB roughly? Somewhere around 655360?
Currently it is set to 65535. Is that something that's OS dependent?
I'm not sure how much memory my server sets aside for disk caching.
Yes, about. It's really a judgement call; you're looking for the
approximate
combined RAM available for disk caching and shared mem. However,
this is
just used as a way of estimating the probability that the data you
want is
cached in memory, so you're just trying to be order-of-magnitude
accurate,
not to-the-MB accurate.
FWIW, I typically set effective_cache_size to the amount of memory in
the machine minus 1G for the OS and various other daemons, etc. But
as Josh said, as long as your somewhere in the ballpark it's probably
good enough.
--
Jim C. Nasby, Sr. Engineering Consultant jnasby@xxxxxxxxxxxxx
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
