Re: measuring disk IOPS?

Anyone? Last call... :)

On Wed, 14 Dec 2005, Charles Sprickman wrote:

> Hello,
>
> I've been digging through the stock mibs included with net-snmp and I've been
> having trouble digging out some of the disk I/O stats that I want. The only
> thing I could find was the "UCD-DISKIO-MIB" mib, which is marked as
> deprecated.
>
> Is there somewhere else I should look? The things I'm interested in grabbing
> and then graphing in mrtg and monitoring via Nagios are:
>
> -IOPS ("I/O Operations Per Second")
> -bytes/second throughput
>
> I also noticed something in the UCD-DISKIO MIB that claims to show "the
> average load of the disk" represented by an integer from 0-100. That seems
> interesting, but there's no notes in the MIB as to how that number is
> calculated, ie: what represents 100% usage?
>
> Some background, these are PostgreSQL servers running on FreeBSD 4.11 and I'm
> needing to pull some info to see what kind of bottleneck I'm hitting here.
> Having real IOPS numbers would really help in sizing up the SAN we're looking
> to buy.
>
> Thanks!
>
> Charles
>
>
>
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