Date: Tue, 29 Jan 2008 17:55:30 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: <freebsd-performance@freebsd.org> Subject: newfs locks entire machine for 20seconds Message-ID: <030401c862a0$23918d50$b6db87d4@multiplay.co.uk>
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I'm just in the midst of setting up a new machine using 7.0-PRERELEASE
and while running newfs to init the data partitions the entire machine
stalled for a good 20seconds when processing a 500GB partition.
I had a number of windows open at the time including:-
1. gstat
2. top showing IO inc system @ 1 second intervals
3. newfs window
The newfs had completed its output, gstat was showing 95% usage on da0
and da0s3g and top was showing no IO users ( all 0% ).
At this point everything froze for ~ 20 seconds then returned to normal.
The machine is running with ULE on 7.0 as mention using an Areca 1220
controller over 8 disks in RAID 6 + Hotspare.
17:44:38 => 17:45:05
Rerunning the newfs reproduces the issue which is good so where do I
go from here?
I'm really interested in looking into this as we have production
machines which are also suffering from intermittent stalls which
could well be related.
Regards
Steve
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