Comments on: uncache!

By: links for 2009-07-14 « Dan Creswell’s Linkblog

links for 2009-07-14 « Dan Creswell’s Linkblog — Tue, 14 Jul 2009 12:04:55 +0000

[...] uncache! « domas mituzas: vaporware, inc. There are few use cases for it. One is for all these people who benchmark stuff and want selective OS cache purges, another is for those who run high performance databases. Remember the O_DIRECT serialization everywhere? Well, XFS does direct I/O in parallel, unless there are cached pages (and they can happen because of any random outside-of-database activity, like ‘file’ command). Once you ‘uncache’ the files, XFS will be very much parallel again o/ o/ (tags: linux filesystem cache management) [...]

By: Remova arquivos do cache de disco | George Guimarães on Tech

Remova arquivos do cache de disco | George Guimarães on Tech — Tue, 14 Jul 2009 01:06:15 +0000

[...] Porém às vezes o cache do seu file system atrapalha. Em procedimentos de benchmark (principalmente de DB), no qual você quer analisar apenas uma das camadas de software, o ideal é desativar o cache. Você pode fazer isso setando algumas opções no /proc, desativando o cache pelo /etc/fstab ou melhor ainda: use o uncache! [...]

By: Uncaching bits in filesystem cache

Uncaching bits in filesystem cache — Thu, 09 Jul 2009 18:17:36 +0000

[...] Domas makes something more useful than I bet most would think: http://mituzas.lt/2009/06/26/uncache/ [...]

By: Domas Mituzas

Domas Mituzas — Fri, 26 Jun 2009 16:42:01 +0000

Partha, I know, but not individually.. ;-)

By: Partha Dutta

Partha Dutta — Fri, 26 Jun 2009 16:11:54 +0000

In new versions of linux, (and RHEL 4u6 and higher), you can also remove entries from the file system cache using /proc/sys/vm/drop_caches