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  1. #1
    Join Date
    Oct 2009
    Posts
    1

    Unanswered: Delete fails with out of memory

    Hello

    I have a large database and I'm trying to execute delete on a table which has some related tables. The query fails with following error:
    ERROR: out of memory
    DETAIL: Failed on request of size 1048576.

    I'm new to postgresql and I'm currently trying to figure out what to do by myself. I've played with some config memory parameters, but with no luck by now. It would be great if somebody could tell me how to solve it or give any clues on why it happens or in which direction to search.

    Here is the log:
    Code:
    2009-10-17 17:02:09 PDTLOG:  database system was shut down at 2009-10-17 17:02:07 PDT
    2009-10-17 17:02:09 PDTLOG:  database system is ready to accept connections
    2009-10-17 17:02:09 PDTLOG:  autovacuum launcher started
    TopMemoryContext: 93376 total in 9 blocks; 10376 free (6 chunks); 83000 used
      TopTransactionContext: 8192 total in 1 blocks; 7632 free (0 chunks); 560 used
        AfterTriggerEvents: 872443512 total in 839 blocks; 9152 free (5 chunks); 872434360 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: 40960 total in 3 blocks; 29544 free (71 chunks); 11416 used
      smgr relation table: 8192 total in 1 blocks; 2816 free (0 chunks); 5376 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: 1024 total in 1 blocks; 936 free (0 chunks); 88 used
          ExecutorState: 581688 total in 5 blocks; 40936 free (14 chunks); 540752 used
            TIDBitmap: 8380416 total in 10 blocks; 360696 free (34 chunks); 8019720 used
            ExprContext: 0 total in 0 blocks; 0 free (0 chunks); 0 used
      Relcache by OID: 8192 total in 1 blocks; 3376 free (0 chunks); 4816 used
      CacheMemoryContext: 667696 total in 20 blocks; 200064 free (0 chunks); 467632 used
        idx_att_data_source: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        idx_att_typeid: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        idx_att_nodeid: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        idx_att_id: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
        bn_attributes_pkey: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_attrdef_adrelid_adnum_index: 1024 total in 1 blocks; 240 free (0 chunks); 784 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_opclass_am_name_nsp_index: 1024 total in 1 blocks; 192 free (0 chunks); 832 used
        pg_foreign_data_wrapper_name_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_class_relname_nsp_index: 1024 total in 1 blocks; 240 free (0 chunks); 784 used
        pg_foreign_server_oid_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_cast_source_target_index: 1024 total in 1 blocks; 240 free (0 chunks); 784 used
        pg_language_name_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_authid_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
        pg_amop_fam_strat_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_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_opclass_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
        pg_foreign_data_wrapper_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_auth_members_member_role_index: 1024 total in 1 blocks; 280 free (0 chunks); 744 used
        pg_ts_dict_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_operator_oprname_l_r_n_index: 1024 total in 1 blocks; 88 free (0 chunks); 936 used
        pg_trigger_tgrelid_tgname_index: 1024 total in 1 blocks; 240 free (0 chunks); 784 used
        pg_enum_typid_label_index: 1024 total in 1 blocks; 280 free (0 chunks); 744 used
        pg_ts_config_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_user_mapping_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_opfamily_am_name_nsp_index: 1024 total in 1 blocks; 192 free (0 chunks); 832 used
        pg_type_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
        pg_aggregate_fnoid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_constraint_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_rewrite_rel_rulename_index: 1024 total in 1 blocks; 280 free (0 chunks); 744 used
        pg_ts_parser_prsname_index: 1024 total in 1 blocks; 280 free (0 chunks); 744 used
        pg_ts_config_cfgname_index: 1024 total in 1 blocks; 280 free (0 chunks); 744 used
        pg_ts_parser_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_operator_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
        pg_namespace_nspname_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
        pg_ts_template_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_amop_opr_fam_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_auth_members_role_member_index: 1024 total in 1 blocks; 280 free (0 chunks); 744 used
        pg_type_typname_nsp_index: 1024 total in 1 blocks; 280 free (0 chunks); 744 used
        pg_opfamily_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_class_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
        pg_proc_proname_args_nsp_index: 1024 total in 1 blocks; 152 free (0 chunks); 872 used
        pg_attribute_relid_attnum_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_language_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_namespace_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_amproc_fam_proc_index: 1024 total in 1 blocks; 88 free (0 chunks); 936 used
        pg_authid_rolname_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
        pg_foreign_server_name_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_attribute_relid_attnam_index: 1024 total in 1 blocks; 280 free (0 chunks); 744 used
        pg_conversion_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
        pg_user_mapping_user_server_index: 1024 total in 1 blocks; 280 free (0 chunks); 744 used
        pg_conversion_name_nsp_index: 1024 total in 1 blocks; 280 free (0 chunks); 744 used
      MdSmgr: 8192 total in 1 blocks; 5200 free (0 chunks); 2992 used
      LOCALLOCK hash: 8192 total in 1 blocks; 3912 free (0 chunks); 4280 used
      Timezones: 79320 total in 2 blocks; 5968 free (0 chunks); 73352 used
      ErrorContext: 8192 total in 1 blocks; 8176 free (0 chunks); 16 used
    2009-10-17 17:05:41 PDTERROR:  out of memory
    2009-10-17 17:05:41 PDTDETAIL:  Failed on request of size 1048576.
    2009-10-17 17:05:41 PDTSTATEMENT:  delete from bn_attributes where id>309279169
    Thanks in advance, Yulia

  2. #2
    Join Date
    Oct 2009
    Posts
    3
    Hi,
    Try to run EXPLAIN on this delete query.
    How many row this table has ?

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