DDF SRB time is high

Pius Chu

DDF SRB time is high
The data is taken from our monitor TMONDB2 for DB2 for 24 hrs.


ADDRESS SPACE PAGEIN PAGEOUT TCB TIME SRB TIME
--------------- -------- ---------
------------ ------------
SYSTEM SERVICES 0 0 1:46.8680 1:20.6355

DATABASE SERVICE 1,370 0 5:54.4345 25:10.1993
IRLM 0 0 .0033
31.8346
DDF 1 0 23.8841
9:23:30.8062


Does anyone know why the SRB time in the distributed address space is so
high (9 hrs and 23 minutes) compared to the database SRB time (25 minutes).
Thanks for the input.

Pius Chu
IR - Operating Systems Support
[login to unmask email]
(212) 460-4764



Philip Gunning

FW: DDF SRB time is high
(in response to Pius Chu)


-----Original Message-----
From: Philip Gunning
To: 'Chu, Pius '
Sent: 1/3/01 2:04 PM
Subject: RE: DDF SRB time is high


Pius, Are you using WLM to manage the enclaves? If not I believe the
time shows up under DDF. -- Phil
-----Original Message-----
From: Chu, Pius
To: [login to unmask email]
Sent: 1/3/01 12:49 PM
Subject: DDF SRB time is high

The data is taken from our monitor TMONDB2 for DB2 for 24 hrs.


ADDRESS SPACE PAGEIN PAGEOUT TCB TIME SRB TIME
--------------- -------- ---------
------------ ------------
SYSTEM SERVICES 0 0 1:46.8680
1:20.6355

DATABASE SERVICE 1,370 0 5:54.4345
25:10.1993
IRLM 0 0 .0033
31.8346
DDF 1 0 23.8841
9:23:30.8062


Does anyone know why the SRB time in the distributed address space is so
high (9 hrs and 23 minutes) compared to the database SRB time (25
minutes).
Thanks for the input.

Pius Chu
IR - Operating Systems Support
[login to unmask email]
(212) 460-4764



the DB2-L webpage at http://www.ryci.com/db2-l. The owners of the list
can

Sanjeev (CTS) S

Re: DDF SRB time is high
(in response to Philip Gunning)
Is not this good to have high SRB time with respect to TCB time
?....not sure , someone please explain !!
Philip's reply looks more logical and derived from experience but my
guess goes to the block prefetch which i think is charged thru' SRB.

It may be wrong unless until confirmed by some experts out here in
the list.

Regards,
Sanjeev
>
>
> -----Original Message-----
> From: Philip Gunning
> To: 'Chu, Pius '
> Sent: 1/3/01 2:04 PM
> Subject: RE: DDF SRB time is high
>
>
> Pius, Are you using WLM to manage the enclaves? If not I believe the
> time shows up under DDF. -- Phil
> -----Original Message-----
> From: Chu, Pius
> To: [login to unmask email]
> Sent: 1/3/01 12:49 PM
> Subject: DDF SRB time is high
>
> The data is taken from our monitor TMONDB2 for DB2 for 24 hrs.
>
>
> ADDRESS SPACE PAGEIN PAGEOUT TCB TIME SRB TIME
> --------------- -------- ---------
> ------------ ------------
> SYSTEM SERVICES 0 0 1:46.8680
> 1:20.6355
>
> DATABASE SERVICE 1,370 0 5:54.4345
> 25:10.1993
> IRLM 0 0 .0033
> 31.8346
> DDF 1 0 23.8841
> 9:23:30.8062
>
>
> Does anyone know why the SRB time in the distributed address space is so
> high (9 hrs and 23 minutes) compared to the database SRB time (25
> minutes).
> Thanks for the input.
>
> Pius Chu
> IR - Operating Systems Support
> [login to unmask email]
> (212) 460-4764
>
>
>
> the DB2-L webpage at < http://www.ryci.com/db2-l > . The owners of the list
> can
>
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Kirk Hampton

Re: DDF SRB time is high
(in response to Sanjeev (CTS) S)
SRB time in the DDF address space will always be high in
comparison to SRB time in the other address spaces. All work done
by the DDF address space on behalf of remote clients is executed in
OS/390 Enclaves, whether or not you are using WLM. And Enclaves
are a pool of "preemptable" SRB's, thus the charge to SRB time.







"S, Sanjeev (CTS)" <[login to unmask email]> on 01/04/2001 01:10:33 AM

Please respond to DB2 Data Base Discussion List <[login to unmask email]>

To: [login to unmask email]
cc: (bcc: Kirk Hampton/Texas Utilities)
Subject: Re: DDF SRB time is high



Is not this good to have high SRB time with respect to TCB time
?....not sure , someone please explain !!
Philip's reply looks more logical and derived from experience but my
guess goes to the block prefetch which i think is charged thru' SRB.

It may be wrong unless until confirmed by some experts out here in
the list.

Regards,
Sanjeev
>
>
> -----Original Message-----
> From: Philip Gunning
> To: 'Chu, Pius '
> Sent: 1/3/01 2:04 PM
> Subject: RE: DDF SRB time is high
>
>
> Pius, Are you using WLM to manage the enclaves? If not I believe the
> time shows up under DDF. -- Phil
> -----Original Message-----
> From: Chu, Pius
> To: [login to unmask email]
> Sent: 1/3/01 12:49 PM
> Subject: DDF SRB time is high
>
> The data is taken from our monitor TMONDB2 for DB2 for 24 hrs.
>
>
> ADDRESS SPACE PAGEIN PAGEOUT TCB TIME SRB TIME
> --------------- -------- ---------
> ------------ ------------
> SYSTEM SERVICES 0 0 1:46.8680
> 1:20.6355
>
> DATABASE SERVICE 1,370 0 5:54.4345
> 25:10.1993
> IRLM 0 0 .0033
> 31.8346
> DDF 1 0 23.8841
> 9:23:30.8062
>
>
> Does anyone know why the SRB time in the distributed address space is so
> high (9 hrs and 23 minutes) compared to the database SRB time (25
> minutes).
> Thanks for the input.
>
> Pius Chu
> IR - Operating Systems Support
> [login to unmask email]
> (212) 460-4764
>
>
>
> the DB2-L webpage at < http://www.ryci.com/db2-l > . The owners of the list
> can
>
-----------------------------------------------------------------------------------------------------------------------------------------

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This e-mail and any files transmitted with it are for the sole use
of the intended recipient(s) and may contain confidential and privileged
information.
If you are not the intended recipient, please contact the sender by reply e-mail
and
destroy all copies of the original message. Any unauthorised review, use,
disclosure,
dissemination, forwarding, printing or copying of this email or any action taken
in
reliance on this e-mail is strictly prohibited and may be unlawful.

Visit us at http://www.cognizant.com
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