Oninit cdi / Archive
Talk to an expert →

Re: Dirty LRU exceeding the LRU_MAX of 2%

Posted in 1999

Topics: Server Administration, Logging & Checkpoints, Platform-Specific Issues, Versions, Editions & End-of-Life

bjarne.wilken.jensen@almbrand.dk — — source: Informix-list mailing list archive (1991-1998)

Hi >Andrew Lawrenson wrote: >Kernoal.Stephens@AUTOZONE.COM wrote in message ><80csie$ad9$1@news.xmission.com>... >> >> >> >> >>Here is what I am seeing. In onstat -R the dirty q's are over 2% dirty. >>onstat -F shows all the flushers as Idle.>> >>I know I have seen this in the post but cannot find it in search. >> >>Attached. >>onstat -R output <onstat -F output>onconfig output >IDS 7.30.UC6 >AIX 4.3.2 >4CPU >512MB > <snip> >There's a bug in certain versions of online that may be affecting you - >Defect 115741, whereby the wakeup code for the page cleaners doesn't work >ad the dirty queues grow beyond LRU_MAX_DIRTY. It certainly affected me in >te NT ver 7.30 (the bug does also affect unix) - we had checkpoints of up >to 2 minutes, where they should have been 1-2 seconds. Upgrading to 7.31 >fixed it for me. > > > Andrew Lawrenson I am running IDS 7.31.UC3 AIX 4.3.2 4CPU 1GB and I see the same picture on my AIX-box. So I doubt that it is fixed in 7.31 version. I know that I have KAIO turned on. On AIX it is turned on default when your root_dbs is created on a raw-device. Bjarne Wilken Jensen Alm. Brand Denmark

↪ replying to bjarne.wilken.jensen@almbrand.dk
David Williams — — source: Informix-list mailing list archive (1991-1998)

In article <80h7ee$jnf$1@news.xmission.com>, bjarne.wilken.jensen@almbra nd.dk writes > >Hi >>Andrew Lawrenson wrote: >>Kernoal.Stephens@AUTOZONE.COM wrote in message >><80csie$ad9$1@news.xmission.com>... >>> >>> >>> >>> >>>Here is what I am seeing. In onstat -R the dirty q's are over 2% dirty. >>>onstat -F shows all the flushers as Idle.>>> >>>I know I have seen this in the post but cannot find it in search. >>> >>>Attached. >>>onstat -R output ><onstat -F output>>onconfig output >>IDS 7.30.UC6 >>AIX 4.3.2 >>4CPU >>512MB >> ><snip> >>There's a bug in certain versions of online that may be affecting you - >>Defect 115741, whereby the wakeup code for the page cleaners doesn't work >>ad the dirty queues grow beyond LRU_MAX_DIRTY. It certainly affected me >in >>te NT ver 7.30 (the bug does also affect unix) - we had checkpoints of up >>to 2 minutes, where they should have been 1-2 seconds. Upgrading to 7.31 >>fixed it for me. >> >> >> Andrew Lawrenson > >I am running >IDS 7.31.UC3 >AIX 4.3.2 >4CPU >1GB > Fixed in 7.31.UC4-1 >and I see the same picture on my AIX-box. >So I doubt that it is fixed in 7.31 version. >I know that I have KAIO turned on. On AIX it is turned on default when your >root_dbs is created >on a raw-device. > > >Bjarne Wilken Jensen >Alm. Brand >Denmark > > > > > -- David Williams

Related threads

Glossary