> > On 08/11/2014 10:56 PM, Sitsofe Wheeler wrote:
...
> >> (I've disabled merging by echoing 1 into nomerges)...
Note that:
nomerges=1 just disables lengthier merge searches;
nomerges=2 disables all of them.
blk-mq has had some bugs where that wasn't always honored;
use iostat -x to see if merges are happening (rrqm/s
and wrqm/s columns) during the run, and/or check the
Disk stats line when fio exits (merge=n/n).
---
Rob Elliott HP Server Storage
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