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From: | Chris Friesen |
Subject: | [Qemu-devel] is there a limit on the number of in-flight I/O operations? |
Date: | Fri, 18 Jul 2014 08:58:52 -0600 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 |
Hi,I've recently run up against an interesting issue where I had a number of guests running and when I started doing heavy disk I/O on a virtio disk (backed via ceph rbd) the memory consumption spiked and triggered the OOM-killer.
I want to reserve some memory for I/O, but I don't know how much it can use in the worst-case.
Is there a limit on the number of in-flight I/O operations? (Preferably as a configurable option, but even hard-coded would be good to know as well.)
Thanks, Chris
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