Memory warnings in alert log

Question

Hi,
We are using Oracle Enterprise 11.2.0.3 and the dba is reporting memory warnings in the alert log on continual nightly basis over last week.
No difference in volume of data being processed or programs so not sure why this is the case - aplogioes don't have details of error to hand.
We run many processees in parallel - database set for auto-parallelism (PARALLEL_DEGREE_POLICY=AUTO) and 3rd party reporting tool relies on this for spped of reports aganist partitoned tables.
Our data loads complete fine despite these messages.
Dba has asked if we can reduce what being done during these times or reduce the number of proceses
Are there any database parameters which can be set to manage memory such that database doesn't exhaust available memory in this way.
We want the database to manage the workload automatically ( would hope via parameter tuning in partciluar of the parameters related to parallel query this would be possible).
Thanks

Answer 1

user5716448 wrote:
Hi,
Aplogies for delya.
Here is the message from alert log
ORA-04031: unable to allocate 512024 bytes of shared memory ("large pool","unknown object","large pool","PX msg pool")
And this is repeated many times in the log.
On IBM Power Series 7 hardware AIX operating system.
Oracle version 11.2.0.3
Any ideas to allow database to manage memory more effectively when many paralllel queries runing - tuning of parallel-related parameters - which ones?
Thanksresults when reasoning is as follows
Parallel must be faster than no parallel
higher degree of parallel must be faster than lower value.
if/when you reduce parallel activities, then this error no longer occurs.