KAIO in AIX
Andre Ngo asked how to add more KAIO on IDS 7.31.UC3 on AIX 4.3. Yuri Dovgart said kio threads equal the number of CPU VPs (NUMCPUVPS). Andre saw NUMCPUVPS 1 but three kio entries in onstat -g iov. Art Kagel explained some administrative VPs also run a kio thread, and Yuri added that kio threads showing on the aio VP are a cosmetic bug. Explained, no change needed.
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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.
Andre Ngo <andre@fiscal.org.jm> wrote in message news:8augdc$aj7$1@nnrp1.deja.com... > Hi all!!! Hi . > I came to a deadlock tying to figure this one out. > Is there a way to add more KAIO to the engine? Number of kio threads is equal to the number of CPU virtual processors in IDS (NUMCPUVPS param in ONCONFIG). > We are currently using Informix Dynamic Server 7.31.UC3 installed on in > AIX 4.3. > Thanks! HTH. -- ------------------------------------------------- With best regards, Yuri Dovgart SAP R/3, Informix technical consultant, Informix Certified Professional, Senior System Consultant System Architecture and High Availability Systems, 'Telecominvest' company Email y_dovgart@tci.ukrtel.net ICQ 39284285
In article <8b56nk$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$1@nnrp1.deja.com...
> > Hi all!!!
>
> Hi .
Thanks for the info, appreciate it alot.
> > I came to a deadlock tying to figure this one out.
> > Is there a way to add more KAIO to the engine?
>
> Number of kio threads is equal to the number of CPU virtual
processors in
> IDS (NUMCPUVPS param in ONCONFIG).
I have a question though, I looked into the onconfig file, and saw that
the NUMCPUVPS is set to 1, and I have around three KAIO running.
Is this a bug or something? Here's a dump of onstat -g iov
Informix Dynamic Server Version 7.31.UC3 -- On-Line -- Up 05:52:01 --
107440 Kbytes
AIO I/O vps:
class/vp s io/s totalops dskread dskwrite dskcopy wakeups io/wup
errors
kio 0 i 0.0 0 0 0 0 0
0.0 0
kio 1 i 0.6 2632 13 2619 0 5723
0.5 0
kio 2 i 0.0 0 0 0 0 0
0.0 0
msc 0 i 0.0 7 0 0 0 7
1.0 0
aio 0 i 0.0 0 0 0 0 0
0.0 0
aio 1 i 0.0 0 0 0 0 0
0.0 0
pio 0 i 0.0 0 0 0 0 0
0.0 0
lio 0 i 0.0 0 0 0 0 0
0.0 0
I am going to increase this and see what happens.
Thanks again!
> > We are currently using Informix Dynamic Server 7.31.UC3 installed
on in
> > AIX 4.3.
> > Thanks!
>
> HTH.
>
> --
> -------------------------------------------------
> With best regards, Yuri Dovgart
> SAP R/3, Informix technical consultant,
> Informix Certified Professional,
> Senior System Consultant
> System Architecture and High Availability Systems,
> 'Telecominvest' company
> Email y_dovgart@tci.ukrtel.net
> ICQ 39284285
>
Sent via Deja.com http://www.deja.com/
Before you buy.
Andre Ngo wrote:
>
> In article <8b56nk$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
> 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