On 02/11/2010 11:12 AM, Patrick Spinler wrote:
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Christian Paro wrote:
Also, note this line from the RedHat doc:
*Note that this setting will only stay in effect until the next time the
machine is booted. If you wish this setting to be permanent, add the
following line to **/etc/sysctl.conf**:*
vm.pagecache = 1 15 80*
Your answer might lie with */proc/sys/vm/pagecache:*
*
*http://kbase.redhat.com/faq/docs/DOC-7055
http://www.ibm.com/developerworks/linux/library/l-adfly.html
Note those documents are for a 2.4 kernel, not a 2.6 kernel, as used by
redhat 5 and suse 10+. When I briefly looked into /proc/sys/vm/* on my
2.6 kernel systems things are much different.
Any pointers to managing buffer and page caching behaviors on a 2.6
system?
Pat,
See "More Like This" at the bottom of the article. Specifically:
http://kbase.redhat.com/faq/docs/DOC-2131
-Justin
It sounds like a potentially promising approach. It doesn't
address the full scope of the issue (z/vm would still rather like
smaller guests where it's easier to bring all the necessary working sets
in) but every little bit might be of help.
disclaimer: every situation is different, test your own workloads, etc
etc.
- -- Pat
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