Fantastic. Thanks (again) Rob! -----Original Message----- From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Rob van der Heij Sent: Thursday, August 15, 2013 10:17 AM To: [email protected] Subject: Re: linux cache
On 15 August 2013 16:44, Dean, David (I/S) <[email protected]> wrote: > Is there any benefit (or negative) to running a "drop_cache" periodically? > > I don't find it helpful in most cases, especially since it does not reduce the server footprint. Shaking up memory like that may even make performance much worse. But I do use it in my 'cmmflush' approach where I have Linux drop the cache and then give back that memory to z/VM. It still has some disadvantages, but the reduction in footprint is very helpful to improve response times. The 'periodically' would be specific moments in your workload rather than every hour (unless maybe on development systems where I do run it from cron). http://zvmperf.wordpress.com/2012/07/06/using-cmm-to-flush-a-linux-guests-memory/ Rob ________________________________ The information contained in this e-mail message is intended only for the personal and confidential use of the designated recipient(s) named above. This message may be an attorney-client or work product communication which is privileged and confidential. It may also contain protected health information that is protected by federal law. If you have received this communication in error, please notify us immediately by telephone and destroy (shred) the original message and all attachments. Any review, dissemination, distribution or copying of this message by any person other than the intended recipient(s) or their authorized agents is strictly prohibited. Thank you. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
