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Buffer Question

Created: 24 Oct 2012 | 3 comments

Version 7.5.3 (Windows)

Hello friends, 

I am having very slow backup speeds for some of my backup jobs.

Activity monitor tells -

info bphbd (pid=35416) wrote first buffer (size=4068)

info bphbd (pid=35416) wrote first buffer (size=3988)

info bphbd (pid=35416) wrote first buffer (size=5666)

info bphbd (pid=35416) wrote first buffer (size=5767)

Other jobs tell - 

info bphbd (pid=35416) wrote first buffer (size=269884)

It is only happen for two of my clients. Can someone please help? 

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Marianne's picture

Best to speak to Oracle DBA...

Quite a number of Oracle RMAN perfomance tuning docs on the web:

http://docs.oracle.com/cd/B19306_01/backup.102/b14191/rcmtunin.htm

http://www.oracle.com/technetwork/database/features/availability/br-optimization-132612.pdf

http://www.oracle.com/technetwork/database/features/availability/s316928-1-175928.pdf

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

bpdown's picture

Thank you kindly Marianne, 

Slow backup are from Teradata. Can tuning my buffer sizes help?

Marianne's picture

I have no experience whatsoever with Teradata.
No idea what settings/tuning parameters are available for Teradata... 
The fact that bphdb is reporting the small sizes tells me that it is controlled by the source - Teradata.
Try to search the web for Teradata buffer tuning?
e.g. http://developer.teradata.com/doc/connectivity/tdnetdp/13.11/webhelp/ResponseBufferSize.html

Don't know if tuning NBU buffers will help. No harm in trying. 
Ensure that bptm log folder exists on media server to monitor effects before and after changes.

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links