From: Renison, Rick (rick.renison@EDS.COM)
Date: Tue Jan 06 2004 - 10:51:48 EST
Wait also is the time the CPU waits for I/O to complete.
> -----Original Message-----
> From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
> Abdellah Djebli
> Sent: December 29, 2003 3:38 PM
> To: aix-l@Princeton.EDU
> Subject: Re: question about CPU Wait%
>
>
> Hi,
>
> Here tey are:
>
> OS: AIX 5.1 ML_05
> devices.sdd.51.rte 1.4.0.5
> 2 x Fiber Adapters F/C 6239 with ROS level 02E01035, each
> connected to SAN
> switch IBM2109-F16
> ESS firmware: 2.1.1.307
>
> Abdu
>
>
>
>
>
>
>
> "Harvey, Bruce T."
> <BTHarvey@LMUS.LEG To:
> aix-l@princeton.edu
> GMASON.COM> cc:
> Sent by: IBM AIX Subject: Re:
> question about CPU Wait%
> Discussion List
> <aix-l@princeton.e
> du>
>
>
> 12/29/2003 02:53
> PM
> Please respond to
> IBM AIX Discussion
> List
>
>
>
>
>
>
> Please provide the O/S version, Maintenance Level, ESS
> firmware release
> level, etc. I seem to recall something about this.
>
> Bruce T. Harvey
> Legg Mason Wood Walker, Inc.
> Corporate Technology - UNIX Admin.
> Red Run 2nd Floor - Owings Mills, MD
> (410) 580-7383 - BTHarvey@LeggMason.com
> -------------------------------------------------------
>
>
>
> -----Original Message-----
> From: Abdellah Djebli [mailto:abdellah.djebli@SICKKIDS.CA]
> Sent: Monday, December 29, 2003 2:20 PM
> To: aix-l@Princeton.EDU
> Subject: question about CPU Wait%
>
>
> Hi All,
>
> We have a system (6xCPU and 12GB RAM) running DB2 connected
> to an IBM ESS
> through two fiber SAN connections.
> My question i, why is it that Wait% column always shows 25-30
> % where there
> is no IO/memory or CPU bottleneck.
> What are the CPUs waiting for?
>
> Thanks in advance.
>
> Abdu
>
>
> Here is an output of vmstat 1 20
>
> kthr memory page faults cpu
> ----- ----------- ------------------------ ------------ -----------
> r b avm fre re pi po fr sr cy in sy cs us sy id wa
> 3 1 601868 1086361 0 0 0 78 182 0 1013 2964 1867
> 15 1 80 3
> 1 2 601872 1086325 0 0 0 0 0 0 1782 5676 4217
> 19 3 47 32
> 1 4 601872 1086256 0 0 0 0 0 0 1936 10431 7614
> 29 4 41 26
> 0 1 601872 1086223 0 0 0 0 0 0 1481 4182 2966
> 0 2 78 21
> 0 1 601872 1086209 0 0 0 0 0 0 1500 6300 4921
> 11 2 69 18
> 1 1 601872 1086300 0 0 0 0 0 0 1563 4618 3248
> 5 2 70 23
> 0 2 601872 1086424 0 0 0 0 0 0 2568 7020 6807
> 7 3 57 32
> 1 5 601879 1086641 0 0 0 0 0 0 2066 7936 5657
> 5 4 59 31
> 1 2 601879 1086737 0 0 0 0 0 0 1590 6203 4937
> 11 3 57 30
> 1 3 601879 1086928 0 0 0 0 0 0 1645 5750 3425
> 3 2 64 31
> 1 3 601893 1086913 0 0 0 0 0 0 1764 7277 3618
> 4 2 63 31
> 0 2 601879 1086936 0 0 0 0 0 0 1953 7266 5748
> 13 4 59 25
> 0 2 601879 1087053 0 0 0 0 0 0 1547 5753 3051
> 7 3 62 28
> 3 1 601879 1086912 0 0 0 0 0 0 2150 7022 4256
> 13 5 51 32
> 0 2 601879 1086967 0 0 0 0 0 0 1441 4229 2847
> 2 2 72 24
> 0 2 601879 1086979 0 0 0 0 0 0 1280 3819 2411
> 1 2 77 21
> 0 1 601879 1086960 0 0 0 0 0 0 1332 3871 2574
> 1 2 78 20
> 0 1 601879 1086993 0 0 0 0 0 0 1321 3946 2622
> 2 2 77 19
> 1 1 601879 1087064 0 0 0 0 0 0 1554 6473 5221
> 19 2 60 19
> 3 0 601879 1087149 0 0 0 0 0 0 1456 5503 3235
> 16 3 61 20
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