Patrick - Do any of these jobs update the same tables? Or do any jobs read a
table that other jobs are updating?
Dennis Williams
DBA, 40%OCP
Lifetouch, Inc.
[EMAIL PROTECTED]
-----Original Message-----
Sent: Tuesday, January 07, 2003 2:15 PM
To: Multiple recipients of list ORACLE-L
Dear,
Since a few weeks I am tuning a big conversion batch written in PL/SQL
(millions of lines of code split over 7 batches)
When the job is running, certain batches stop with ORA-1555 : Snapshot too
old. Other batches run well till the end.
Bizarre is that not always the same job stops.
When I do a trace I see nothing. With a normal trace I am pretty sure that I
will never see it.
Rollback segments are rarely used. So making the rollbacks bigger or smaller
is not the solution.
They also tried to change the commit rate. That was not the solution.
When I modified the optimal size to NULL value to avoid shrinking and cached
3 heavily used sequences some runs went all the way but
since a week it stops again with the same annoying error.
After that I put an event in the init.ora file : event = "1555 trace name
processstate forever, level 10"
A trace file was generated but I could not find the error in the trace file.
I am pretty sure that Oracle just dumps all open cursors in a file. Since
there are 100 of cursors opened I do not have a clue which one
is provoking the error.
I already looked at the batches and I have identified in 5 of them a "fetch
across commit".
Still they have the error. But in the 2 remaining I can not find
this.(surely the 2 biggest ones, nice !)
So my question is :
How can I know where in the code the error is generated ?
Must I change the definition of the event ? (I know there are other options
but I can not find them right away)
Should I use DBMS_PROFILER ? (it generates massive files !)
Must they write exceptions everywhere in their code ?
Can somebody help me ?
Please do not send me an explanation of the "snapshot too old" error. I wake
up with it and I go asleep with it.
Patrick
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Author: DENNIS WILLIAMS
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