Re: Session PGA memory max exceeded 2 GB and crashes.

  • From: "Norman Dunbar" <norman.dunbar@xxxxxxxxxxxxxxxxxxxxxxxxx>
  • To: <nigel_cl_thomas@xxxxxxxxx>
  • Date: Wed, 20 Dec 2006 15:32:28 +0000


(Your private email to me has not arrived yet - this one from the list,

>> you've somehow blown the call stack. double the SGA and it will just
blow a few milliseconds later...
Oh dear, so changing the kernel parameter won't help much then. Blowing
the stack sounds like we have a recursion problem - possibly. Hmmmmmmm.

>> I bet that Norman's little proc is
>> - executing every row
That's what I'm trying to find out.

>> - doing a PkTrace.Enter on every row (in the entire table) and
stacking its context
Yes - possibly. It is certainly doing it once per call.

>> - maybe not doing a PkTrace.leave and so not popping the stack
(either through code error or 
>> PL/SQL to SQL integration snafu)
No - the code is (a) performing an exit on sucessful exit, and the
exception handlers are perfroming an error call which itself exits. Good
call however.

>> - and so generally exploding.
It certainly does.

>> As I said privately to Norman
>> 1) pull the function call out of the SQL
>> 2) rewrite the SQL to be WHERE LAST_DATTIM < value
Right, I can do this as we have the source.

>> 3) have a look through Pk_Utils.fnc_get_sys_par to see where it's
lost its pop
Already done - it pops all its pushes!

>> 4) go home and start cooking the brussel sprouts (there's barely
time before Monday...)
They've been biling away nicely since April. We Scots like our veggies
boiled to a mush - apparently.


Norman Dunbar.
Contract Oracle DBA.
Rivers House, Leeds.

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