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MQSeries.net Forum Index » IBM MQ Installation/Configuration Support » WRTHRSH greater than 20?

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JAdams
PostPosted: Mon Mar 22, 2004 7:24 am    Post subject: WRTHRSH greater than 20? Reply with quote

Apprentice

Joined: 11 Jul 2002
Posts: 47
Location: Lakeland, FL

Does anyone have WRTHRSH set greater than 20?

RMF reports are showing a ton of I/O to the volumes containing my active logs. Our DB2 systems does not do near this amount of I/O. I have the OUTBUFF set to 4000, but my WRTHRSH is still set to the default of 20. I believe this will reduce my I/O and improve performance, but I wanted to know what other folks are doing. According to the manual I can set this up to 256. Any advice would be appreciated.

Thanks,
Jason
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Jason Adams
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zpat
PostPosted: Mon Sep 20, 2021 2:09 am    Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5849
Location: UK

I have the same question. We are seeing "log buffer pool shortage" warnings so hoping that increasing WRTHRSH would help.

Ours is set to 15. The default is 20 - even this seems low to me.
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Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error.
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bruce2359
PostPosted: Mon Sep 20, 2021 3:50 am    Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 9394
Location: US: west coast, almost. Otherwise, enroute.

There are other and interrelated logging parameters. Post your CSQ6LOGP parms and values.

A good performance ref: https://www.ibm.com/docs/en/SSFKSJ_9.0.0/com.ibm.mq.con.doc/q019310_.html
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zpat
PostPosted: Tue Sep 21, 2021 4:09 am    Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5849
Location: UK

COMPLOG=NONE
DEALLCT=0
INBUFF=60
MAXARCH=1000
MAXRTU=2
OFFLOAD=YES
OUTBUFF=4000
TWOACTV=YES
TWOARCH=YES
TWOBSDS=YES
WRTHRSH=15
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Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error.
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