I'm interested in some more detail on how ZFS intent log behaves for
updated done via a memory mapped file - i.e. will the ZIL log updates
done to an mmap'd file or not ?
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On 06/01/2012 02:33 PM, Jeff Bacon wrote:
I'd be interested in the results of such tests. You can change the primarycache
parameter on the fly, so you could test it in less time than it
takes for me to type this email :-)
-- Richard
Tried that. Performance headed south like a cat with its tail
On 05/29/2012 03:29 AM, Daniel Carosone wrote:
For the mmap case: does the ARC keep a separate copy, or does the vm
system map the same page into the process's address space? If a
separate copy is made, that seems like a potential source of many
kinds of problems - if it's the same page then th
On 05/28/2012 10:12 PM, Andrew Gabriel wrote:
On 05/28/12 20:06, Iwan Aucamp wrote:
I'm thinking of doing the following:
- relocating mmaped (mongo) data to a zfs filesystem with only
metadata cache
- reducing zfs arc cache to 16 GB
Is there any other recommendations - and is
likely to improve
performance.
--
Iwan Aucamp
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