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KAIO in AIX

Posted in 2000

Topics: Installation, Setup & Upgrades, Transactions, Locking & Isolation, Platform-Specific Issues

Andre Ngo — — source: Informix-list mailing list archive (1991-1998)

Hi all!!! I came to a deadlock tying to figure this one out. Is there a way to add more KAIO to the engine? We are currently using Informix Dynamic Server 7.31.UC3 installed on in AIX 4.3. Thanks! Andre Ngo Sent via Deja.com http://www.deja.com/ Before you buy.

↪ replying to Andre Ngo
Yuri Dovgart — — source: Informix-list mailing list archive (1991-1998)

Andre Ngo <andre@fiscal.org.jm> wrote in message news:8augdc$aj7$1@nnrp1.deja.com... > Hi all!!! Hi . > I came to a deadlock tying to figure this one out. > Is there a way to add more KAIO to the engine? Number of kio threads is equal to the number of CPU virtual processors in IDS (NUMCPUVPS param in ONCONFIG). > We are currently using Informix Dynamic Server 7.31.UC3 installed on in > AIX 4.3. > Thanks! HTH. -- ------------------------------------------------- With best regards, Yuri Dovgart SAP R/3, Informix technical consultant, Informix Certified Professional, Senior System Consultant System Architecture and High Availability Systems, 'Telecominvest' company Email y_dovgart@tci.ukrtel.net ICQ 39284285

↪ replying to Yuri Dovgart
Andre Ngo — — source: Informix-list mailing list archive (1991-1998)

In article <8b56nk$n5q$1@hyppo.gu.net>, "Yuri Dovgart" <y_dovgart@tci.ukrtel.net> wrote: > Andre Ngo <andre@fiscal.org.jm> wrote in message > news:8augdc$aj7$1@nnrp1.deja.com... > > Hi all!!! > > Hi . Thanks for the info, appreciate it alot. > > I came to a deadlock tying to figure this one out. > > Is there a way to add more KAIO to the engine? > > Number of kio threads is equal to the number of CPU virtual processors in > IDS (NUMCPUVPS param in ONCONFIG). I have a question though, I looked into the onconfig file, and saw that the NUMCPUVPS is set to 1, and I have around three KAIO running. Is this a bug or something? Here's a dump of onstat -g iov Informix Dynamic Server Version 7.31.UC3 -- On-Line -- Up 05:52:01 -- 107440 Kbytes AIO I/O vps: class/vp s io/s totalops dskread dskwrite dskcopy wakeups io/wup errors kio 0 i 0.0 0 0 0 0 0 0.0 0 kio 1 i 0.6 2632 13 2619 0 5723 0.5 0 kio 2 i 0.0 0 0 0 0 0 0.0 0 msc 0 i 0.0 7 0 0 0 7 1.0 0 aio 0 i 0.0 0 0 0 0 0 0.0 0 aio 1 i 0.0 0 0 0 0 0 0.0 0 pio 0 i 0.0 0 0 0 0 0 0.0 0 lio 0 i 0.0 0 0 0 0 0 0.0 0 I am going to increase this and see what happens. Thanks again! > > We are currently using Informix Dynamic Server 7.31.UC3 installed on in > > AIX 4.3. > > Thanks! > > HTH. > > -- > ------------------------------------------------- > With best regards, Yuri Dovgart > SAP R/3, Informix technical consultant, > Informix Certified Professional, > Senior System Consultant > System Architecture and High Availability Systems, > 'Telecominvest' company > Email y_dovgart@tci.ukrtel.net > ICQ 39284285 > Sent via Deja.com http://www.deja.com/ Before you buy.

↪ replying to Andre Ngo
Art S. Kagel & Family — — source: Informix-list mailing list archive (1991-1998)

Andre Ngo wrote: > > In article <8b56nk$n5q$1@hyppo.gu.net>, > "Yuri Dovgart" <y_dovgart@tci.ukrtel.net> wrote: > > Andre Ngo <andre@fiscal.org.jm> wrote in message [SNIP] > > Number of kio threads is equal to the number of CPU virtual > processors in > > IDS (NUMCPUVPS param in ONCONFIG). > I have a question though, I looked into the onconfig file, and saw that > the NUMCPUVPS is set to 1, and I have around three KAIO running. > Is this a bug or something? Here's a dump of onstat -g iov > Informix Dynamic Server Version 7.31.UC3 -- On-Line -- Up 05:52:01 -- > 107440 Kbytes > AIO I/O vps: > class/vp s io/s totalops dskread dskwrite dskcopy wakeups io/wup > errors > kio 0 i 0.0 0 0 0 0 0 > 0.0 0 > kio 1 i 0.6 2632 13 2619 0 5723 > 0.5 0 > kio 2 i 0.0 0 0 0 0 0 > 0.0 0 No problem. In addition to the kio thread in each CPU VP some of the administrative VPs also run a kio thread. -- Art S. Kagel & Family kagel@erols.com

↪ replying to Andre Ngo
Yuri Dovgart — — source: Informix-list mailing list archive (1991-1998)

> I have a question though, I looked into the onconfig file, and saw that > the NUMCPUVPS is set to 1, and I have around three KAIO running. > Is this a bug or something? Here's a dump of onstat -g iov Addition to the Art's answer : If you will also look into the 'onstat -g ath' output you will see some kio threads running on the aio VP - this is just cosmetic bug, don't worry. -- ------------------------------------------------- With best regards, Yuri Dovgart SAP R/3, Informix technical consultant, Informix Certified Professional, Senior System Consultant System Architecture and High Availability Systems, 'Telecominvest' company Email y_dovgart@tci.ukrtel.net ICQ 39284285

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