AIX - Out of Memory

Hi All,

Looking for some help with regards to an 'Out of Memory' issue I have
with our Postgresql install on AIX. When running large updates or
select queries we get an out of memory error returned and details
entered in the log file like below. This is a 64-bit install and I have
set the ulimit for the postgres user to unlimited.

An example of the log details are below :

TopMemoryContext: 69552 total in 8 blocks; 4560 free (12 chunks); 64992
used
TopTransactionContext: 8192 total in 1 blocks; 7520 free (0 chunks);
672 used
AfterTriggerEvents: 131063808 total in 26 blocks; 576 free (7
chunks); 131063232 used
PL/PgSQL function context: 24576 total in 2 blocks; 16328 free (4
chunks); 8248 used
CFuncHash: 8192 total in 1 blocks; 1680 free (0 chunks); 6512 used
Rendezvous variable hash: 8192 total in 1 blocks; 1680 free (0
chunks); 6512 used
PLpgSQL function cache: 24520 total in 2 blocks; 3744 free (0 chunks);
20776 used
Operator class cache: 8192 total in 1 blocks; 1680 free (0 chunks);
6512 used
Operator lookup cache: 24576 total in 2 blocks; 11888 free (5 chunks);
12688 used
MessageContext: 65536 total in 4 blocks; 31832 free (2 chunks); 33704
used
smgr relation table: 24576 total in 2 blocks; 13904 free (4 chunks);
10672 used
TransactionAbortContext: 32768 total in 1 blocks; 32736 free (0
chunks); 32 used
Portal hash: 8192 total in 1 blocks; 1680 free (0 chunks); 6512 used
PortalMemory: 8192 total in 1 blocks; 7888 free (0 chunks); 304 used
PortalHeapMemory: 1024 total in 1 blocks; 768 free (0 chunks); 256
used
ExecutorState: 57344 total in 3 blocks; 25472 free (13 chunks);
31872 used
ExprContext: 0 total in 0 blocks; 0 free (0 chunks); 0 used
ExprContext: 0 total in 0 blocks; 0 free (0 chunks); 0 used
Relcache by OID: 24576 total in 2 blocks; 14912 free (3 chunks); 9664
used
CacheMemoryContext: 817392 total in 20 blocks; 120560 free (16
chunks); 696832 used
stprice_idx2: 2048 total in 1 blocks; 704 free (0 chunks); 1344 used
stprice_idx1: 2048 total in 1 blocks; 584 free (0 chunks); 1464 used
stprice_pkey: 2048 total in 1 blocks; 704 free (0 chunks); 1344 used
CachedPlan: 7168 total in 3 blocks; 1808 free (0 chunks); 5360 used
CachedPlanSource: 7168 total in 3 blocks; 1776 free (0 chunks); 5392
used
SPI Plan: 1024 total in 1 blocks; 688 free (0 chunks); 336 used
CachedPlan: 1024 total in 1 blocks; 96 free (0 chunks); 928 used
CachedPlanSource: 3072 total in 2 blocks; 1792 free (1 chunks); 1280
used
SPI Plan: 1024 total in 1 blocks; 808 free (0 chunks); 216 used
pg_attrdef_adrelid_adnum_index: 2048 total in 1 blocks; 608 free (0
chunks); 1440 used
pg_database_datname_index: 2048 total in 1 blocks; 752 free (0
chunks); 1296 used
pg_index_indrelid_index: 2048 total in 1 blocks; 704 free (0
chunks); 1344 used
pg_ts_dict_oid_index: 3072 total in 2 blocks; 1744 free (3 chunks);
1328 used
pg_aggregate_fnoid_index: 3072 total in 2 blocks; 1744 free (3
chunks); 1328 used
pg_language_name_index: 3072 total in 2 blocks; 1744 free (3
chunks); 1328 used
pg_statistic_relid_att_index: 3072 total in 2 blocks; 1600 free (2
chunks); 1472 used
pg_ts_dict_dictname_index: 3072 total in 2 blocks; 1648 free (2
chunks); 1424 used
pg_namespace_nspname_index: 3072 total in 2 blocks; 1696 free (2
chunks); 1376 used
pg_opfamily_oid_index: 3072 total in 2 blocks; 1744 free (3 chunks);
1328 used
pg_opclass_oid_index: 3072 total in 2 blocks; 1696 free (2 chunks);
1376 used
pg_ts_parser_prsname_index: 3072 total in 2 blocks; 1648 free (2
chunks); 1424 used
pg_amop_fam_strat_index: 3072 total in 2 blocks; 1384 free (2
chunks); 1688 used
pg_opclass_am_name_nsp_index: 3072 total in 2 blocks; 1624 free (3
chunks); 1448 used
pg_trigger_tgrelid_tgname_index: 3072 total in 2 blocks; 1600 free
(2 chunks); 1472 used
pg_cast_source_target_index: 3072 total in 2 blocks; 1600 free (2
chunks); 1472 used
pg_auth_members_role_member_index: 3072 total in 2 blocks; 1648 free
(2 chunks); 1424 used
pg_attribute_relid_attnum_index: 3072 total in 2 blocks; 1600 free
(2 chunks); 1472 used
pg_ts_config_cfgname_index: 3072 total in 2 blocks; 1648 free (2
chunks); 1424 used
pg_authid_oid_index: 3072 total in 2 blocks; 1696 free (2 chunks);
1376 used
pg_ts_config_oid_index: 3072 total in 2 blocks; 1744 free (3
chunks); 1328 used
pg_conversion_default_index: 3072 total in 2 blocks; 1432 free (3
chunks); 1640 used
pg_language_oid_index: 3072 total in 2 blocks; 1696 free (2 chunks);
1376 used
pg_enum_oid_index: 3072 total in 2 blocks; 1744 free (3 chunks);
1328 used
pg_proc_proname_args_nsp_index: 3072 total in 2 blocks; 1576 free (3
chunks); 1496 used
pg_ts_parser_oid_index: 3072 total in 2 blocks; 1744 free (3
chunks); 1328 used
pg_database_oid_index: 3072 total in 2 blocks; 1696 free (2 chunks);
1376 used
pg_conversion_name_nsp_index: 3072 total in 2 blocks; 1648 free (2
chunks); 1424 used
pg_class_relname_nsp_index: 3072 total in 2 blocks; 1600 free (2
chunks); 1472 used
pg_attribute_relid_attnam_index: 3072 total in 2 blocks; 1648 free
(2 chunks); 1424 used
pg_class_oid_index: 3072 total in 2 blocks; 1696 free (2 chunks);
1376 used
pg_amproc_fam_proc_index: 3072 total in 2 blocks; 1384 free (2
chunks); 1688 used
pg_operator_oprname_l_r_n_index: 3072 total in 2 blocks; 1384 free
(2 chunks); 1688 used
pg_index_indexrelid_index: 3072 total in 2 blocks; 1696 free (2
chunks); 1376 used
pg_type_oid_index: 3072 total in 2 blocks; 1696 free (2 chunks);
1376 used
pg_rewrite_rel_rulename_index: 3072 total in 2 blocks; 1648 free (2
chunks); 1424 used
pg_authid_rolname_index: 3072 total in 2 blocks; 1696 free (2
chunks); 1376 used
pg_auth_members_member_role_index: 3072 total in 2 blocks; 1648 free
(2 chunks); 1424 used
pg_enum_typid_label_index: 3072 total in 2 blocks; 1648 free (2
chunks); 1424 used
pg_constraint_oid_index: 3072 total in 2 blocks; 1744 free (3
chunks); 1328 used
pg_conversion_oid_index: 3072 total in 2 blocks; 1744 free (3
chunks); 1328 used
pg_ts_template_tmplname_index: 3072 total in 2 blocks; 1648 free (2
chunks); 1424 used
pg_ts_config_map_index: 3072 total in 2 blocks; 1624 free (3
chunks); 1448 used
pg_namespace_oid_index: 3072 total in 2 blocks; 1696 free (2
chunks); 1376 used
pg_type_typname_nsp_index: 3072 total in 2 blocks; 1648 free (2
chunks); 1424 used
pg_operator_oid_index: 3072 total in 2 blocks; 1696 free (2 chunks);
1376 used
pg_amop_opr_fam_index: 3072 total in 2 blocks; 1600 free (2 chunks);
1472 used
pg_proc_oid_index: 3072 total in 2 blocks; 1696 free (2 chunks);
1376 used
pg_opfamily_am_name_nsp_index: 3072 total in 2 blocks; 1624 free (3
chunks); 1448 used
pg_ts_template_oid_index: 3072 total in 2 blocks; 1744 free (3
chunks); 1328 used
MdSmgr: 8192 total in 1 blocks; 7488 free (0 chunks); 704 used
LOCALLOCK hash: 24576 total in 2 blocks; 15984 free (5 chunks); 8592
used
Timezones: 53584 total in 2 blocks; 3744 free (0 chunks); 49840 used
ErrorContext: 8192 total in 1 blocks; 8160 free (0 chunks); 32 used
2010-02-15 09:20:24 GMT <postgres>ERROR: out of memory
2010-02-15 09:20:24 GMT <postgres>DETAIL: Failed on request of size 40.
2010-02-15 09:20:24 GMT <postgres>STATEMENT: update stprice set break2
= 9999999.99 where price2 = 0;

This is a 64-bit install (8.3) on AIX 5.3 , when I try to set the shared
memory setting higher the 64MB I also get the following error log and
query connection stopped when running a large select statement.

>>LOG: server process (PID 229740) was terminated by signal 11
>>DETAIL: The postmaster has commanded this server process to roll back
the current transaction and exit, because another server pro
cess exited abnormally and possibly corrupted shared memory.

Any help on this matter would be gratefully accepted

Thanks
fran

___________________________________________________

This email is intended for the named recipient. The information contained
in it is confidential. You should not copy it for any purposes, nor
disclose its contents to any other party. If you received this email
in error, please notify the sender immediately via email, and delete it from
your computer.

Any views or opinions presented are solely those of the author and do not
necessarily represent those of the company.

Cromwell Tools Limited, PO Box 14, 65 Chartwell Drive
Wigston, Leicester LE18 1AT. Tel 0116 2888000
Registered in England and Wales, Reg No 00986161
VAT GB 115 5713 87 900
__________________________________________________