11g AMM Affection to DB Performance

Hi All,
We had just migrated from Oracle 10g to 11g without changing the Oracle 11g default settings.
OLD 10g Settings:
PGA_AGGREGATE_TARGET: 32MB
WORKAREA_SIZE_POLICY: AUTO
SORT_AREA_SIZE: 65536
HASH_AREA_SIZE: 131072
New Oracle 11g setting.
sql> show parameter memory
NAME | TYPE |VALUE
hi_shared_memory_address | integer | 0
memory_max_target | big integer |3280M
memory_target | big integer |3280M
shared_memory_address | integer |0
PGA_AGGREGATE_TARGET: 0
WORKAREA_SIZE_POLICY: AUTO
SORT_AREA_SIZE: 65536
HASH_AREA_SIZE: 131072
I understand that because memory_target and memory_max_target are set, so the AMM in 11g is enabled. Therefore PAT is 0 and WASP is set to AUTO.
Our Problem is that every Thursday/ Friday morning, the database is working on memory_intensive operations: create index, analyze, select distinct, group by, order by, union, intersect, minus and sort-merge joins. We had problem of ORA-01652. Unable to extend temp tablespace by 128 in tablespace TEMP.
In old DB with 10g, this wasn't a problem.
My question is how this new setting affected the DB performance? How to adjust the settings?
Thank you!

Thanks!
So again why do you think this problem is related to PGA & other memory configuration?
I suggest you increase the size of TEMP tablespace.SELECT * FROM dba_temp_files WHERE TABLESPACE_NAME='TEMP'
1 /DATAFILES/signet/temp01.dbf 1 TEMP 17179869184 2097152 AVAILABLE 1 YES 17179869184 2097152 131072 17178820608 2097024
2 /DATAFILES/signet/temp02.dbf 2 TEMP 17179869184 2097152 AVAILABLE 2 YES 17179869184 2097152 131072 17178820608 2097024
17179869184 bytes each for temp files.
SELECT property_value
FROM database_properties
WHERE property_name = 'DEFAULT_TEMP_TABLESPACE'
TEMP
I don't think the TEMP tablespace is not big enough. Because we just upgrated to 11g. I guess this issue is because of the difference of memory setttings.
Can also see another thread in this forum:
ORA-01652 Unable to extend temp segment by 128 in tablespace TEMP
Thanks!
Edited by: Amethyst Qin on 10/06/2010 18:57

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