RE: Rollback Segs

[Lee Cullip]

I think that's probably the case with most third party applications, if developers haven't coded their apps to use a large rollback segment for certain transactions (which I find is the case with most developers ;-) ) then the only option is to turn off all but the large rollback seg.

 

Cheers

Lee

 

-----Original Message-----
From: Fermin Bernaus [mailto:[EMAIL PROTECTED]
Sent: 16 July 2003 11:19
To: Multiple recipients of list ORACLE-L
Subject: RE: Rollback Segs

 

    Yes you are right, sorry but I made a mistake, since we are using Baan IVc4 which works against Oracle we have no means to interfere with its transactions when they are commited to Oracle and we can not modify them so that it uses a specific rollback segment, so the only way for us to do it is to disable all except the one we want it to use.

-----Mensaje original-----
De: Lee Cullip [mailto:[EMAIL PROTECTED]
Enviado el: miércoles, 16 de julio de 2003 10:54
Para: Multiple recipients of list ORACLE-L
Asunto: RE: Rollback Segs

set transaction use rollback segment xxxx only works if it's the first statement in your transaction, an easy way to make sure this is the case is to issue a commit directly before issuing this statement.

I believe this has been a feature of Oracle since way back in version 7 (Correct me if I'm wrong).

 

Hope this helps.

Cheers

Lee

-----Original Message-----
From: Fermin Bernaus [mailto:[EMAIL PROTECTED]
Sent: 16 July 2003 09:09
To: Multiple recipients of list ORACLE-L
Subject: RE: Rollback Segs

 

    Which database version are you using? as long as I know, at least on Oracle 8.0.6 you can not specify which rollback segment a particular transaction should use. We disable all rollback segments and only enable those which we know won't make big updates / deletes crash.

 

-----Mensaje original-----
De: venkat Rama [mailto:[EMAIL PROTECTED]
Enviado el: miércoles, 16 de julio de 2003 6:34
Para: Multiple recipients of list ORACLE-L
Asunto: Rollback Segs

Hi Friends,

 

I have 150Gb database with 30 rollback segs with optimal settings!! for normal operations no problems!! But we are doing massive updates for some of big tables!! So we are using vb programs and connecting to the database thru odbc dsn. My first question is how to set transaction use rollback segment rbs_big? I tried to set as first stmt, but its not using rbs_big segment, its using some other rollback segment. Is that good idea to make all my rollback segs maxextents unlimited to avoid maxextents reached error?? I have lot of rbs space nearly 10Gb. I saw one time, one of my rbs segment extented 2gb and failed transaction with maxextents reached with 5m initial and next, minextents 20 and optimal 100M.

 

Any help will be appreciated

Thanks

venkat.

 

 

 

 

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