Re: measurement of read/writes
Re: measurement of read/writes
- Subject: Re: measurement of read/writes
- From: Kevin Elliott <email@hidden>
- Date: Sun, 16 Sep 2012 11:29:10 -0700
On Sep 16, 2012, at 3:33 AM, Patrick Proniewski <email@hidden> wrote:
> I wonder how these stats are calculated, and if they can be trusted. "Written" is always bigger than "read", even on the macbook pro at work (sysadmin workload: mail/web/ssh/vmware).
As an aside, if your machine has plenty of memory and your workload isn't particularly wide, then this is what I'd expect. OS X caches very aggressively, so every read only happens once (adding to the cache), but every write generally ends up happening as stuff is flushed to disk.
-Kevin
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