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тАО01-11-2006 03:35 AM
тАО01-11-2006 03:35 AM
I noticed that 1 Sybase server had 9 dio and 10 bio outstanding all the time. All 8 other Sybase servers have 1 dio and 2 bio as their base.
Sometimes it increases when there is activity but it never goes below these values.
How is that possible ?
Wim
Solved! Go to Solution.
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тАО01-11-2006 04:34 AM
тАО01-11-2006 04:34 AM
SolutionProbably BIO to mailboxes and DIO to TCP sockets.
Check with ANAL/SYS.. SET PROC... SHOW PROC/CHAN and I expect to see 'busy' indicators on the channels with active IO.
Hein.
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тАО01-11-2006 05:34 AM
тАО01-11-2006 05:34 AM
Re: BIOLM , DIOLM question
Robert
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тАО01-11-2006 06:10 PM
тАО01-11-2006 06:10 PM
Re: BIOLM , DIOLM question
Now at 8:00 AM I have more activity and the other db servers have significant values too.
Each tcp client has 1 outstanding bio and 1 outstanding dio. Except 1 or 2. I guess these must be dying or doing some keepalive or so (2 have no ISCONNECTED status on socket).
Wim
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тАО01-11-2006 06:40 PM
тАО01-11-2006 06:40 PM
Re: BIOLM , DIOLM question
DNS$ADVER has 104 outstanding bio.
It has 4 MB, 8 EI and 2 FW channels open.
And another one.
DTSS$CLERK has 51 outstanding bio.
Is has 1 MB, 3 EI and 1 FW channels open.
How can this be explained ?
Wim
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тАО01-12-2006 06:52 AM
тАО01-12-2006 06:52 AM
Re: BIOLM , DIOLM question
Wim
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тАО01-17-2006 08:08 PM
тАО01-17-2006 08:08 PM
Re: BIOLM , DIOLM question
Dammed difficult to find how many IO's a Sybase server has outstanding to disk ...
Wim
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тАО01-18-2006 01:16 AM
тАО01-18-2006 01:16 AM
Re: BIOLM , DIOLM question
There does not seem to be a good way of looking at the pending I/O queue of a device especially if you are interested I/O requests for a specific process. So I am contemplating writing a program to do this.
At present the current development version of my PWAIT SDA extension will display one of the IRP queues for SCSI&FC disks. If you want to play it is here
http://eisner.encompasserve.org/~miller/pwait.zip
when I get the time will refine this. I am thinking this could be a seperate SDA extension to look at I/O queues.
Any thoughts or opinions on how useful or otherwise such a program would be or what it should do then let me know here or via the email address on http://www.encompasserve.org/~miller/
Purely Personal Opinion
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тАО01-18-2006 02:07 AM
тАО01-18-2006 02:07 AM
Re: BIOLM , DIOLM question
I'm wondering if the usage you're seeing is associated with scheduled events?
Robert