JES2 Performance Problem

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2 total messages Started by Kevin Kalajan - SunConnect Produ... Mon, 11 Jan 1993 23:05

#1129

Author: Kevin Kalajan - SunConnect Produ...
Date: Mon, 11 Jan 1993 23:05

16 lines
1245 bytes

I could not post to bit.listserv.jes2-l.

We have done exhaustive testing in trying to pinpoint why JES2
is waiting anywhere from 1-4 seconds between sending blocks
to a Sun emulating a 3770 SNA/RJE station. This includes Sniffer
and GTF traces that show the link idle for the above time while
we wait for JES2 to send the next block.


What can we do to "tune" JES2?  We have gone through tuning the NCP and cannot
see any better results.  Is there some buffer pool tuning that can be done to
"pre-read" disk spool data in JES2 so that spool data can be sent from the 
buffer pool instead of waiting to read the disk? Is there internal throttle that
JES2 is using that can be modified?

Any help will be appreciated.

Re: JES2 Performance Problem

#1130

Author: Michael C. Cambria
Date: Tue, 12 Jan 1993 17:41

23 lines
1451 bytes

In article <ll3v99INNl3@exodus.Eng.Sun.COM>, kek@bullterrier.Eng.Sun.COM (Kevin Kalajan - SunConnect Product Marketing) writes...
>I could not post to bit.listserv.jes2-l.
> 
>We have done exhaustive testing in trying to pinpoint why JES2
>is waiting anywhere from 1-4 seconds between sending blocks
>to a Sun emulating a 3770 SNA/RJE station. This includes Sniffer
>and GTF traces that show the link idle for the above time while
>we wait for JES2 to send the next block.
> 
> 
>What can we do to "tune" JES2?  We have gone through tuning the NCP and cannot
>see any better results.  Is there some buffer pool tuning that can be done to
>"pre-read" disk spool data in JES2 so that spool data can be sent from the 
>buffer pool instead of waiting to read the disk? Is there internal throttle that
>JES2 is using that can be modified?
> 
>Any help will be appreciated.
> 

Have you already ruled out outbound session pacing?

/Mike

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