Heavy I/O blocks FreeBSD box for several seconds

Poul-Henning Kamp phk at phk.freebsd.dk
Wed Jul 6 17:22:21 UTC 2011

In message <20110706170132.GA68775 at troutmask.apl.washington.edu>, Steve Kargl w

>I periodically ran the same type test in the 2008 post over the
>last three years.  Nothing has changed.  I even set up an account
>on one node in my cluster for jeffr to use.  He was too busy to
>investigate at that time.

Isn't this just the lemming-syncer hurling every dirty block over
the cliff at the same time ?

To find out:  Run gstat and keep and eye on the leftmost column

The road map for fixing that has been known for years...

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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