Re: Opinions re: Sun OS disk caching with KAIO, On or Off?

There is a very good book titled "Sun Performance and Tuning" by Adrian Cockcroft which I think you would find very helpful. -Bart dmoeller@geocities.com wrote: > > Hello, > > For those of you using Sun boxes out there with Informix, help. Using 'top' > recently I was looking at the memory free on our Sun E4000 (Solaris 2.5.1) and > noticed that it was: > > Memory: 2048M real, 32M free, 52M swap in use, 972M swap free > > Notice the 32M free? After I reboot and bring all the instances back up that > number is 900M. Then over a period of time (with no new shared memory > segments being added) it goes back down to 32M. I have found that this is > due to Sun's disk caching. Well with KAIO turned on it seems unnecessary and > Informix could make good use of the 868M of memory. So can you turn off > Sun's disk caching? Should you? Has anyone done it and run the system to see > the difference? The sole function of this machine is a database server... > > Thanks very much for any info, > > Dave. > > -----------== Posted via Deja News, The Discussion Network ==---------- > http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own