PV Timeout values

[Chad_7]

Hey Everyone

I need to know what the maximum timeout value used for oracle database

IE pvchange -t .......

My customer is getting lbolt errors and its currently set at 90

[Scott Van Kalken]

From memory HP do not really reccommend changing it lower than 180.

[Michael Tully]

Hi,

The default value is usually far too low, but increasing above 90 is quite okay, in fact up to 180 is fine particularly for Disk Storage Arrays, such XP 256, 512 EMC and autoraid. If you speak with HP, they will tell you 180 anyway.

HTH
-Michael

[A. Clay Stephenson]

Hi Chad:

The answer is that it depends. For single disks the 60 or seconds is reasonable but for for arrays, I would go with 120 at a minimum and about 240 as a maximum. Somewhere in the 120-180 range is a rather value all around value for a disk array.

Regards, Clay

[Chad_7]

So a timeout value for Oracle can be greater than 120?

[Roger Baptiste]

The setting of timeout value
is not related to database, but the disks being used.

For EMC disks here, i use
180 seconds, which should be a comfortable number to get a response from the disks.

You can set it to 180 and
observe.

Regarding lbolt errors,
pvtimeout is only part of the
story. If it is happening
often, you would need to
have a closer look at your
connections and disk subsystems. What disks are you using?

-raj

[Chad_7]

A500 connected to 2 external SMART drives.
Getting LBOLT erros when system is under heavy IO load. I have found several documents say not to got over 90 and some saying you can go up to 180. I need some clarification

[Patrick Wallek]

I would personally set it at 180 and monitor and see what happens.

If you are getting really frequent errors, even after changing the value, call HP as there could potentially be a hardware problem.

[Sanjay_6]

Hi Chad,

Take a look at the threads below,

http://us-support.external.hp.com/cki/bin/doc.pl/sid=855d7a640c36f7f161/screen=ckiDisplayDocument?docId=200000048391490

http://us-support.external.hp.com/cki/bin/doc.pl/sid=855d7a640c36f7f161/screen=ckiDisplayDocument?docId=200000050088204

Hope this helps.

Regds
P.S. : You should not be required to increase the timeout value that high. Maybe a change of some other kernel parameter or even a disk might help.

Thanks