RE: My F820 is slow .... - toasters

31 Oct 2002


      Pawel,
    Have you grown your volumes lately? If so, how many disks did you
add to the volumes when you grew them? I have seen customers who have
volumes that are at 90%-95% and they add one or two disks to increase the
disk space for the volume. What this does is creates a hot spot where any
new writes going to those volumes only gets written to the 1 or two disks
which were added = bad performance because WAFL is not able to stripe across
all the disks in the volume. 
    		Mike
-----Original Message-----
From: Pawel Rogocz [mailto:pawel@rogocz.com]
Sent: Thursday, October 31, 2002 4:16 PM
To: Mike Ball; toasters@mathworks.com
Subject: RE: My F820 is slow ....
Here it is:
/vol/vol1/           338309500  292869428   45440072    87%    /vol/vol1/
/vol/vol1/.snapshot   37589944   16548736   21041208    44%
/vol/vol1/.snapshot
/vol/vol2/           338309500  303317696   34991804    90%    /vol/vol2/
/vol/vol2/.snapshot   37589944   13034816   24555128    35%
/vol/vol2/.snapshot
/vol/vol0/            50119928    1674084   48445844     3%    /vol/vol0/
/vol/vol0/.snapshot   12529980     142548   12387432     1%
/vol/vol0/.snapshot
/vol/vol3/           112769836   63064324   49705512    56%    /vol/vol3/
/vol/vol3/.snapshot   12529980   20120056          0   161%
/vol/vol3/.snapshot
/vol/vol4/           338309500  269767512   68541988    80%    /vol/vol4/
/vol/vol4/.snapshot   37589944   13586164   24003780    36%
/vol/vol4/.snapshot
-----Original Message-----
From: Mike Ball [mailto:MBall@DATALINK.com]
Sent: Thursday, October 31, 2002 12:22 PM
To: 'Pawel Rogocz'; toasters@mathworks.com
Subject: RE: My F820 is slow ....
Pawel,
    Are your file systems becoming full (type "df" from netapp")?
    	Mike
-----Original Message-----
From: Pawel Rogocz [mailto:pawel@rogocz.com]
Sent: Thursday, October 31, 2002 1:24 PM
To: toasters@mathworks.com
Subject: My F820 is slow ....
I run  6.2.1 on F820 and I have bunch of Sun boxes ( around 60 ) who do
NFS mounts.
The filer has more than one volume and sometimes during the day the output
of systat -x shows 100% disk util for a couple of minutes.
1. Is there a way to find out which volume/disk is causing bottleneck ?
2. Is there a way to find which client is causing the load to spike ?
3. Can disk util be monitored via SNMP ? I was not able to find anything
 in the MIB provided on NOW.
thanks,
Pawel
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