Originally posted by: woodstea

I've noticed that in the vmstat -v output, it's always exactly the same number for the following statistic no matter what system I'm logged into (at least for AIX 6.1):

2484 filesystem I/Os blocked with no fsbuf

Google that phrase (without the number) and you'll see plenty of examples with the same count. My understanding is that this one deals with JFS, so shouldn't apply to a system whose filesystems are all JFS2. Unfortunately, customers I am working with see this number and think something needs to be tuned. I can always say "don't worry about it", but it makes me curious.

Anyone know why this count doesn't show zero? How about making it "4815162342" instead?

Rob
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Originally posted by: SystemAdmin

Its the statistics since boot. Probably at some point there was a shortage of filesystem buffers. Maybe it never occurred again after that....or the system is already tuned. So you see the same number everytime. After a reboot, you will see it as zero or a different number.

PS: You can use ioo to tune the fsbufs.

r/
R
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Originally posted by: woodstea

No, it's the same number no matter how many times you reboot.

I don't get the sense it's actually coming from a real shortage of buffers. It's like some algorithm is coded in such a way that you always start with that number.
#AIX-Forum

Originally posted by: SystemAdmin

I just rebooted 4 of my servers over the weekend and 3 of them show 2228. One of them is 2771.

Maybe due to the same activities occurring at startup there is a shortage at that time only?!

r/
R
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Originally posted by: SystemAdmin

Btw all the 4 servers are on TL09 in my case.

r/
R
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