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From: | Alberto Garcia |
Subject: | Re: [Qemu-devel] [Qemu-block] [PATCH] qcow2: Optimize L2 table cache size based on image and cluster sizes |
Date: | Tue, 04 Oct 2016 16:31:52 +0200 |
User-agent: | Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu) |
On Tue 04 Oct 2016 03:39:52 PM CEST, Ed Swierk wrote: > This change replaces the hardcoded default L2 table cache size with a > value computed from the image size and cluster size. The resulting > default cache size is just large enough to service random accesses in > the entire image. That might be a lot of memory if the image is big. 1 TB qcow2 image == 128 MB L2 cache. See https://bugzilla.redhat.com/show_bug.cgi?id=1377735#c2 If we want to add this feature, I think I'd rather make it explicit. Berto
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