Messages in this thread | | | Date | Wed, 08 Sep 2004 10:31:13 -0700 | From | "Martin J. Bligh" <> | Subject | Re: swapping and the value of /proc/sys/vm/swappiness |
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> It seems to me that the 5% number in there is more or less arbitrary. > If we are on a big memory Altix (4 TB), 5% of memory would be 200 GB. > That is a lot of page cache.
For HPC, maybe. For a fileserver, it might be far too little. That's the trouble ... it's all dependant on the workload. Personally, I'd prefer to get rid of manual tweakables (which are a pain in the ass in the field anyway), and try to have the kernel react to what the customer is doing. I guess we can leave them there for overrides, but a self-tunable default would be most desirable.
For instance, would be nice if we started doing writeback to the spindles that weren't busy much earlier than if the disks were thrashing.
M.
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