Memory error

Yesterday I ran an SQL import. It failed after 3.33 hours with following
message:

ERROR: out of memory

DETAIL: Failed on request of size 32.

********** Error **********

ERROR: out of memory

SQL state: 53200
Detail: Failed on request of size 32.

The log file is as follows;

2009-08-26 18:43:40 PDT LOG: checkpoints are occurring too frequently (28
seconds apart)
2009-08-26 18:43:40 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 18:45:10 PDT LOG: checkpoints are occurring too frequently (28
seconds apart)
2009-08-26 18:45:10 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 18:45:36 PDT LOG: checkpoints are occurring too frequently (26
seconds apart)
2009-08-26 18:45:36 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 18:50:20 PDT LOG: checkpoints are occurring too frequently (27
seconds apart)
2009-08-26 18:50:20 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 18:51:21 PDT LOG: checkpoints are occurring too frequently (27
seconds apart)
2009-08-26 18:51:21 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 18:54:01 PDT LOG: checkpoints are occurring too frequently (27
seconds apart)
2009-08-26 18:54:01 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 18:54:27 PDT LOG: checkpoints are occurring too frequently (26
seconds apart)
2009-08-26 18:54:27 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 18:54:51 PDT LOG: checkpoints are occurring too frequently (24
seconds apart)
2009-08-26 18:54:51 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 18:55:17 PDT LOG: checkpoints are occurring too frequently (26
seconds apart)
2009-08-26 18:55:17 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 19:06:04 PDT LOG: checkpoints are occurring too frequently (26
seconds apart)
2009-08-26 19:06:04 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 19:12:39 PDT LOG: checkpoints are occurring too frequently (29
seconds apart)
2009-08-26 19:12:39 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 19:13:08 PDT LOG: checkpoints are occurring too frequently (29
seconds apart)
2009-08-26 19:13:08 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 19:14:13 PDT LOG: checkpoints are occurring too frequently (28
seconds apart)
2009-08-26 19:14:13 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 19:15:47 PDT LOG: checkpoints are occurring too frequently (29
seconds apart)
2009-08-26 19:15:47 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
2009-08-26 19:16:09 PDT LOG: checkpoints are occurring too frequently (22
seconds apart)
2009-08-26 19:16:09 PDT HINT: Consider increasing the configuration
parameter "checkpoint_segments".
TopMemoryContext: 49416 total in 6 blocks; 4768 free (5 chunks); 44648 used
TopTransactionContext: 8192 total in 1 blocks; 7776 free (0 chunks); 416
used
AfterTriggerEvents: 317710336 total in 49 blocks; 1312 free (42 chunks);
317709024 used
Operator class cache: 8192 total in 1 blocks; 3848 free (0 chunks); 4344
used
Operator lookup cache: 24576 total in 2 blocks; 14072 free (6 chunks);
10504 used
MessageContext: 131072 total in 5 blocks; 13008 free (4 chunks); 118064
used
smgr relation table: 8192 total in 1 blocks; 2808 free (0 chunks); 5384
used
TransactionAbortContext: 32768 total in 1 blocks; 32752 free (0 chunks);
16 used
Portal hash: 8192 total in 1 blocks; 3912 free (0 chunks); 4280 used
PortalMemory: 8192 total in 1 blocks; 8040 free (0 chunks); 152 used
PortalHeapMemory: 2048 total in 1 blocks; 888 free (0 chunks); 1160 used
ExecutorState: 65592 total in 4 blocks; 22888 free (45 chunks); 42704
used
ExprContext: 0 total in 0 blocks; 0 free (0 chunks); 0 used
HashTableContext: 8192 total in 1 blocks; 8096 free (0 chunks); 96
used
HashBatchContext: 2113560 total in 10 blocks; 915344 free (8
chunks); 1198216 used
HashTableContext: 8192 total in 1 blocks; 8144 free (1 chunks); 48
used
HashBatchContext: 2113560 total in 10 blocks; 434960 free (8
chunks); 1678600 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
ExprContext: 0 total in 0 blocks; 0 free (0 chunks); 0 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
ExprContext: 0 total in 0 blocks; 0 free (0 chunks); 0 used
ExprContext: 8192 total in 1 blocks; 8176 free (0 chunks); 16 used
Relcache by OID: 8192 total in 1 blocks; 3376 free (0 chunks); 4816 used
CacheMemoryContext: 667472 total in 20 blocks; 204496 free (0 chunks);
462976 used
keycodeindex: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
dateindex: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
gifts_pkey: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
pet_temp_kc_kc_index: 1024 total in 1 blocks; 344 free (0 chunks); 680
used
keycodes_pkey: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
pet_temp_gift_kc_index: 1024 total in 1 blocks; 344 free (0 chunks); 680
used
pet_temp_gift_index: 1024 total in 1 blocks; 344 free (0 chunks); 680
used
pg_database_datname_index: 1024 total in 1 blocks; 344 free (0 chunks);
680 used
pg_index_indrelid_index: 1024 total in 1 blocks; 304 free (0 chunks);
720 used
pg_ts_dict_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680
used
pg_aggregate_fnoid_index: 1024 total in 1 blocks; 344 free (0 chunks);
680 used
pg_language_name_index: 1024 total in 1 blocks; 344 free (0 chunks); 680
used
pg_statistic_relid_att_index: 1024 total in 1 blocks; 240 free (0
chunks); 784 used
pg_ts_dict_dictname_index: 1024 total in 1 blocks; 280 free (0 chunks);
744 used
pg_namespace_nspname_index: 1024 total in 1 blocks; 304 free (0 chunks);
720 used
pg_opfamily_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680
used
pg_opclass_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720
used
pg_ts_parser_prsname_index: 1024 total in 1 blocks; 280 free (0 chunks);
744 used
pg_amop_fam_strat_index: 1024 total in 1 blocks; 88 free (0 chunks); 936
used
pg_opclass_am_name_nsp_index: 1024 total in 1 blocks; 192 free (0
chunks); 832 used
pg_trigger_tgrelid_tgname_index: 1024 total in 1 blocks; 240 free (0
chunks); 784 used
pg_cast_source_target_index: 1024 total in 1 blocks; 240 free (0
chunks); 784 used
pg_auth_members_role_member_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
pg_attribute_relid_attnum_index: 1024 total in 1 blocks; 240 free (0
chunks); 784 used
pg_ts_config_cfgname_index: 1024 total in 1 blocks; 280 free (0 chunks);
744 used
pg_authid_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720
used
pg_ts_config_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680
used
pg_conversion_default_index: 1024 total in 1 blocks; 128 free (0
chunks); 896 used
pg_language_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680
used
pg_enum_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
pg_proc_proname_args_nsp_index: 1024 total in 1 blocks; 152 free (0
chunks); 872 used
pg_ts_parser_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680
used
pg_database_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720
used
pg_conversion_name_nsp_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
pg_class_relname_nsp_index: 1024 total in 1 blocks; 240 free (0 chunks);
784 used
pg_attribute_relid_attnam_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
pg_class_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720
used
pg_amproc_fam_proc_index: 1024 total in 1 blocks; 88 free (0 chunks);
936 used
pg_operator_oprname_l_r_n_index: 1024 total in 1 blocks; 88 free (0
chunks); 936 used
pg_index_indexrelid_index: 1024 total in 1 blocks; 304 free (0 chunks);
720 used
pg_type_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
pg_rewrite_rel_rulename_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
pg_authid_rolname_index: 1024 total in 1 blocks; 304 free (0 chunks);
720 used
pg_auth_members_member_role_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
pg_enum_typid_label_index: 1024 total in 1 blocks; 280 free (0 chunks);
744 used
pg_constraint_oid_index: 1024 total in 1 blocks; 344 free (0 chunks);
680 used
pg_conversion_oid_index: 1024 total in 1 blocks; 344 free (0 chunks);
680 used
pg_ts_template_tmplname_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
pg_ts_config_map_index: 1024 total in 1 blocks; 192 free (0 chunks); 832
used
pg_namespace_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680
used
pg_type_typname_nsp_index: 1024 total in 1 blocks; 280 free (0 chunks);
744 used
pg_operator_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720
used
pg_amop_opr_fam_index: 1024 total in 1 blocks; 240 free (0 chunks); 784
used
pg_proc_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
pg_opfamily_am_name_nsp_index: 1024 total in 1 blocks; 192 free (0
chunks); 832 used
pg_ts_template_oid_index: 1024 total in 1 blocks; 344 free (0 chunks);
680 used
MdSmgr: 8192 total in 1 blocks; 7744 free (0 chunks); 448 used
LOCALLOCK hash: 8192 total in 1 blocks; 3912 free (0 chunks); 4280 used
Timezones: 48616 total in 2 blocks; 5968 free (0 chunks); 42648 used
ErrorContext: 8192 total in 1 blocks; 8176 free (3 chunks); 16 used
2009-08-26 19:16:41 PDT world margo ERROR: out of memory
2009-08-26 19:16:41 PDT world margo DETAIL: Failed on request of size 32.
2009-08-26 19:16:41 PDT world margo STATEMENT: insert into pet.gifts
(select a.idnumber, a.amount, a.date, a.keycode, a.don_code, a.gift_id,
a.gift_type, a.fund, a.iho_flag, a.iho_name,
a.soft_credit, a.add_date, a.edit_date, a.deleted, a.orig_id,
a.batch_code, a.soft_id, a.delete_date, a.directresponse, a.sustsignup,
a.origkey, a.notes, a.clnt_giftid, a.source, a.importbatch, a.archive
from pet.gifts_temp as a
left join pet.keycodes as b
on a.keycode = b.keycode
left join pet.gifts as c
on (a.gift_id = c.gift_id)
where b.keycode is not null
and c.gift_id is null
);

Please tell me what I need to do to insert this data into my database.