pgmeminfo
今天介绍一个非常简单的扩展
pgmeminfo，其有助于调查 Postgres 的内存使用情况。第一个函数pgmeminfo返回有关函数mallinfo()提供的内存使用情况的glibc信息。它比使用top或htop珍贵得多。
第二个函数
pgmeminfo_contexts返回有关内存上下文的数据 - 这是 PostgreSQL 内部内存管理。相同的数据可以通过视图pg_get_backend_memory_contexts显示。函数pgmeminfo_contexts可以简单地累积数据，并且可以简单地限制内存上下文上的迭代深度。它比视图上的递归查询快一点（但这并不是太重要）。
postgres=# select version();
version
---------------------------------------------------------------------------------------------------------
PostgreSQL 16.0 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-21), 64-bit
(1 row)
postgres=#
postgres=# \dx
List of installed extensions
Name | Version | Schema | Description
-----------+---------+------------+------------------------------
pgmeminfo | 1.0 | public | show memory usage
plpgsql | 1.0 | pg_catalog | PL/pgSQL procedural language
(2 rows)
postgres=# \dx+ pgmeminfo
Objects in extension "pgmeminfo"
Object description
-------------------------------------------
function pgmeminfo()
function pgmeminfo_contexts(integer,text)
(2 rows)
postgres=#
函数的定义，如下：
postgres=# \df+ pgmeminfo
List of functions
Schema | Name | Result data type | Argument data types | Type | Volatility | Parallel | Owner | Security | Access privileges | Language | Internal name | Description
--------+-----------+------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------+------------+----------+----------+----------+-------------------+----------+---------------+-------------
public | pgmeminfo | record | OUT arena bigint, OUT ordblks bigint, OUT smblks bigint, OUT hblks bigint, OUT hblkhd bigint, OUT usmblks bigint, OUT fsmblks bigint, OUT uordblks bigint, OUT fordblks bigint, OUT keepcost bigint | func | volatile | unsafe | postgres | invoker | | c | pgmeminfo |
(1 row)
postgres=#
postgres=# \df+ pgmeminfo_contexts
List of functions
Schema | Name | Result data type | Argument data types | Type | Volatility | Parallel | Owner | Security | Access privileges | Language | Internal name | Description
--------+--------------------+------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------+------------+----------+----------+----------+-------------------+----------+--------------------+-------------
public | pgmeminfo_contexts | SETOF record | deep integer DEFAULT 0, accum_mode text DEFAULT 'all'::text, OUT name text, OUT ident text, OUT parent text, OUT level integer, OUT total_bytes bigint, OUT total_nblocks bigint, OUT free_bytes bigint, OUT used_bytes bigint | func | volatile | unsafe | postgres | invoker | | c | pgmeminfo_contexts |
(1 row)
postgres=#
函数的使用，如下：
postgres=# SELECT * FROM pgmeminfo();
arena | ordblks | smblks | hblks | hblkhd | usmblks | fsmblks | uordblks | fordblks | keepcost
---------+---------+--------+-------+--------+---------+---------+----------+----------+----------
1888256 | 20 | 0 | 3 | 929792 | 0 | 0 | 1315424 | 572832 | 134304
(1 row)
postgres=#
postgres=# select * from pgmeminfo_contexts(deep => 1, accum_mode=>'off');
name | ident | parent | level | total_bytes | total_nblocks | free_bytes | used_bytes
--------------------------+--------------------------+------------------+-------+-------------+---------------+------------+------------
TopMemoryContext | | | 0 | 97664 | 5 | 14464 | 83200
TopTransactionContext | | TopMemoryContext | 1 | 8192 | 1 | 7752 | 440
dynahash | CFuncHash | TopMemoryContext | 1 | 8192 | 1 | 592 | 7600
RegexpCacheMemoryContext | | TopMemoryContext | 1 | 1024 | 1 | 760 | 264
dynahash | TableSpace cache | TopMemoryContext | 1 | 8192 | 1 | 2128 | 6064
dynahash | Type information cache | TopMemoryContext | 1 | 24368 | 2 | 2648 | 21720
dynahash | Record information cache | TopMemoryContext | 1 | 8192 | 1 | 1616 | 6576
dynahash | Operator lookup cache | TopMemoryContext | 1 | 24576 | 2 | 10792 | 13784
RowDescriptionContext | | TopMemoryContext | 1 | 8192 | 1 | 6896 | 1296
MessageContext | | TopMemoryContext | 1 | 32768 | 3 | 12192 | 20576
dynahash | Operator class cache | TopMemoryContext | 1 | 8192 | 1 | 592 | 7600
PgStat Shared Ref Hash | | TopMemoryContext | 1 | 7216 | 2 | 688 | 6528
PgStat Shared Ref | | TopMemoryContext | 1 | 8192 | 4 | 3200 | 4992
PgStat Pending | | TopMemoryContext | 1 | 16384 | 5 | 15960 | 424
dynahash | smgr relation table | TopMemoryContext | 1 | 32768 | 3 | 16880 | 15888
TransactionAbortContext | | TopMemoryContext | 1 | 32768 | 1 | 32504 | 264
dynahash | Portal hash | TopMemoryContext | 1 | 8192 | 1 | 592 | 7600
TopPortalContext | | TopMemoryContext | 1 | 8192 | 1 | 7664 | 528
dynahash | Relcache by OID | TopMemoryContext | 1 | 16384 | 2 | 3584 | 12800
CacheMemoryContext | | TopMemoryContext | 1 | 1048576 | 8 | 261600 | 786976
WAL record construction | | TopMemoryContext | 1 | 49760 | 2 | 6376 | 43384
dynahash | PrivateRefCount | TopMemoryContext | 1 | 8192 | 1 | 2648 | 5544
MdSmgr | | TopMemoryContext | 1 | 8192 | 1 | 6776 | 1416
dynahash | LOCALLOCK hash | TopMemoryContext | 1 | 16384 | 2 | 4640 | 11744
GUCMemoryContext | | TopMemoryContext | 1 | 24576 | 2 | 12880 | 11696
dynahash | Timezones | TopMemoryContext | 1 | 104112 | 2 | 2648 | 101464
ErrorContext | | TopMemoryContext | 1 | 8192 | 1 | 7928 | 264
(27 rows)
postgres=#
## deep => 0, accum_mode=>'all' 显示累计大小
postgres=# select * from pgmeminfo_contexts();
name | ident | parent | level | total_bytes | total_nblocks | free_bytes | used_bytes
------------------+-------+--------+-------+-------------+---------------+------------+------------
TopMemoryContext | | | 0 | 1957552 | 240 | 566096 | 1391456
(1 row)
postgres=#
## deep => 1, accum_mode=>'all'
postgres=# SELECT * FROM pgmeminfo_contexts(deep => 1);
name | ident | parent | level | total_bytes | total_nblocks | free_bytes | used_bytes
--------------------------+--------------------------+------------------+-------+-------------+---------------+------------+------------
TopMemoryContext | | | 0 | 1957552 | 240 | 564912 | 1392640
TopTransactionContext | | TopMemoryContext | 1 | 8192 | 1 | 7752 | 440
dynahash | CFuncHash | TopMemoryContext | 1 | 8192 | 1 | 592 | 7600
RegexpCacheMemoryContext | | TopMemoryContext | 1 | 41104 | 16 | 17320 | 23784
dynahash | TableSpace cache | TopMemoryContext | 1 | 8192 | 1 | 2128 | 6064
dynahash | Type information cache | TopMemoryContext | 1 | 24368 | 2 | 2648 | 21720
dynahash | Record information cache | TopMemoryContext | 1 | 8192 | 1 | 1616 | 6576
dynahash | Operator lookup cache | TopMemoryContext | 1 | 24576 | 2 | 10792 | 13784
RowDescriptionContext | | TopMemoryContext | 1 | 8192 | 1 | 6896 | 1296
MessageContext | | TopMemoryContext | 1 | 32768 | 3 | 12000 | 20768
dynahash | Operator class cache | TopMemoryContext | 1 | 8192 | 1 | 592 | 7600
PgStat Shared Ref Hash | | TopMemoryContext | 1 | 7216 | 2 | 688 | 6528
PgStat Shared Ref | | TopMemoryContext | 1 | 8192 | 4 | 3200 | 4992
PgStat Pending | | TopMemoryContext | 1 | 16384 | 5 | 15960 | 424
dynahash | smgr relation table | TopMemoryContext | 1 | 32768 | 3 | 16880 | 15888
TransactionAbortContext | | TopMemoryContext | 1 | 32768 | 1 | 32504 | 264
dynahash | Portal hash | TopMemoryContext | 1 | 8192 | 1 | 592 | 7600
TopPortalContext | | TopMemoryContext | 1 | 82992 | 9 | 45216 | 37776
dynahash | Relcache by OID | TopMemoryContext | 1 | 16384 | 2 | 3584 | 12800
CacheMemoryContext | | TopMemoryContext | 1 | 1247232 | 166 | 325440 | 921792
WAL record construction | | TopMemoryContext | 1 | 49760 | 2 | 6376 | 43384
dynahash | PrivateRefCount | TopMemoryContext | 1 | 8192 | 1 | 2648 | 5544
MdSmgr | | TopMemoryContext | 1 | 8192 | 1 | 6776 | 1416
dynahash | LOCALLOCK hash | TopMemoryContext | 1 | 16384 | 2 | 4640 | 11744
GUCMemoryContext | | TopMemoryContext | 1 | 57344 | 5 | 25584 | 31760
dynahash | Timezones | TopMemoryContext | 1 | 104112 | 2 | 2648 | 101464
ErrorContext | | TopMemoryContext | 1 | 8192 | 1 | 7928 | 264
(27 rows)
postgres=#
## 全部显示，不累积
postgres=# SELECT * FROM pgmeminfo_contexts(deep => -1, accum_mode => 'off');
name | ident | parent | level | total_bytes | total_nblocks | free_bytes | used_bytes
--------------------------+------------------------------------------------+--------------------------+-------+-------------+---------------+------------+------------
TopMemoryContext | | | 0 | 97664 | 5 | 14464 | 83200
TopTransactionContext | | TopMemoryContext | 1 | 8192 | 1 | 7752 | 440
dynahash | CFuncHash | TopMemoryContext | 1 | 8192 | 1 | 592 | 7600
RegexpCacheMemoryContext | | TopMemoryContext | 1 | 1024 | 1 | 760 | 264
RegexpMemoryContext | ^(pgmeminfo_contexts)$ | RegexpCacheMemoryContext | 2 | 13360 | 5 | 4928 | 8432
RegexpMemoryContext | ^(pgmeminfo)$ | RegexpCacheMemoryContext | 2 | 13360 | 5 | 5744 | 7616
RegexpMemoryContext | ^\\echo.*$ | RegexpCacheMemoryContext | 2 | 13360 | 5 | 5888 | 7472
dynahash | TableSpace cache | TopMemoryContext | 1 | 8192 | 1 | 2128 | 6064
dynahash | Type information cache | TopMemoryContext | 1 | 24368 | 2 | 2648 | 21720
dynahash | Record information cache | TopMemoryContext | 1 | 8192 | 1 | 1616 | 6576
dynahash | Operator lookup cache | TopMemoryContext | 1 | 24576 | 2 | 10792 | 13784
RowDescriptionContext | | TopMemoryContext | 1 | 8192 | 1 | 6896 | 1296
MessageContext | | TopMemoryContext | 1 | 32768 | 3 | 12192 | 20576
dynahash | Operator class cache | TopMemoryContext | 1 | 8192 | 1 | 592 | 7600
PgStat Shared Ref Hash | | TopMemoryContext | 1 | 7216 | 2 | 688 | 6528
PgStat Shared Ref | | TopMemoryContext | 1 | 8192 | 4 | 3200 | 4992
PgStat Pending | | TopMemoryContext | 1 | 16384 | 5 | 15960 | 424
dynahash | smgr relation table | TopMemoryContext | 1 | 32768 | 3 | 16880 | 15888
TransactionAbortContext | | TopMemoryContext | 1 | 32768 | 1 | 32504 | 264
dynahash | Portal hash | TopMemoryContext | 1 | 8192 | 1 | 592 | 7600
TopPortalContext | | TopMemoryContext | 1 | 8192 | 1 | 7664 | 528
PortalContext | <unnamed> | TopPortalContext | 2 | 1024 | 1 | 600 | 424
ExecutorState | | PortalContext | 3 | 49200 | 4 | 15736 | 33464
printtup | | ExecutorState | 4 | 8192 | 1 | 7928 | 264
Table function arguments | | ExecutorState | 4 | 8192 | 1 | 7856 | 336
ExprContext | | ExecutorState | 4 | 8192 | 1 | 4000 | 4192
dynahash | Relcache by OID | TopMemoryContext | 1 | 16384 | 2 | 3584 | 12800
CacheMemoryContext | | TopMemoryContext | 1 | 1048576 | 8 | 261600 | 786976
index info | pg_class_tblspc_relfilenode_index | CacheMemoryContext | 2 | 2048 | 2 | 656 | 1392
index info | pg_toast_2619_index | CacheMemoryContext | 2 | 2048 | 2 | 616 | 1432
index info | pg_description_o_c_o_index | CacheMemoryContext | 2 | 3072 | 2 | 944 | 2128
index info | pg_depend_reference_index | CacheMemoryContext | 2 | 3072 | 2 | 944 | 2128
index info | pg_depend_depender_index | CacheMemoryContext | 2 | 3072 | 2 | 944 | 2128
EventTriggerCache | | CacheMemoryContext | 2 | 8192 | 1 | 7928 | 264
dynahash | Event Trigger Cache | EventTriggerCache | 3 | 8192 | 1 | 2648 | 5544
index info | pg_statistic_ext_relid_index | CacheMemoryContext | 2 | 1024 | 1 | 0 | 1024
index info | pg_extension_name_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_extension_oid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_index_indrelid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
relation rules | pg_available_extensions | CacheMemoryContext | 2 | 8192 | 4 | 1504 | 6688
index info | pg_db_role_setting_databaseid_rol_index | CacheMemoryContext | 2 | 2048 | 2 | 584 | 1464
index info | pg_user_mapping_user_server_index | CacheMemoryContext | 2 | 2048 | 2 | 728 | 1320
index info | pg_user_mapping_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_type_oid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_type_typname_nsp_index | CacheMemoryContext | 2 | 2048 | 2 | 544 | 1504
index info | pg_ts_template_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_ts_template_tmplname_index | CacheMemoryContext | 2 | 2048 | 2 | 760 | 1288
index info | pg_ts_parser_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_ts_parser_prsname_index | CacheMemoryContext | 2 | 2048 | 2 | 760 | 1288
index info | pg_ts_dict_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_ts_dict_dictname_index | CacheMemoryContext | 2 | 2048 | 2 | 760 | 1288
index info | pg_ts_config_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_ts_config_cfgname_index | CacheMemoryContext | 2 | 2048 | 2 | 760 | 1288
index info | pg_ts_config_map_index | CacheMemoryContext | 2 | 3072 | 2 | 1232 | 1840
index info | pg_transform_type_lang_index | CacheMemoryContext | 2 | 2048 | 2 | 616 | 1432
index info | pg_transform_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_tablespace_oid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_subscription_rel_srrelid_srsubid_index | CacheMemoryContext | 2 | 2048 | 2 | 728 | 1320
index info | pg_subscription_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_subscription_subname_index | CacheMemoryContext | 2 | 2048 | 2 | 760 | 1288
index info | pg_statistic_relid_att_inh_index | CacheMemoryContext | 2 | 3072 | 2 | 912 | 2160
index info | pg_statistic_ext_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_statistic_ext_name_index | CacheMemoryContext | 2 | 2048 | 2 | 760 | 1288
index info | pg_statistic_ext_data_stxoid_inh_index | CacheMemoryContext | 2 | 2048 | 2 | 728 | 1320
index info | pg_sequence_seqrelid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_replication_origin_roname_index | CacheMemoryContext | 2 | 1024 | 1 | 40 | 984
index info | pg_replication_origin_roiident_index | CacheMemoryContext | 2 | 1024 | 1 | 40 | 984
index info | pg_class_relname_nsp_index | CacheMemoryContext | 2 | 2048 | 2 | 544 | 1504
index info | pg_range_rngtypid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_range_rngmultitypid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_publication_rel_prrelid_prpubid_index | CacheMemoryContext | 2 | 2048 | 2 | 728 | 1320
index info | pg_publication_rel_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_publication_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_publication_namespace_pnnspid_pnpubid_index | CacheMemoryContext | 2 | 2048 | 2 | 728 | 1320
index info | pg_publication_namespace_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 40 | 984
index info | pg_publication_pubname_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_proc_oid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_proc_proname_args_nsp_index | CacheMemoryContext | 2 | 3072 | 2 | 944 | 2128
index info | pg_partitioned_table_partrelid_index | CacheMemoryContext | 2 | 1024 | 1 | 40 | 984
index info | pg_parameter_acl_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_parameter_acl_parname_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_opfamily_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_opfamily_am_name_nsp_index | CacheMemoryContext | 2 | 3072 | 2 | 1232 | 1840
index info | pg_operator_oid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_operator_oprname_l_r_n_index | CacheMemoryContext | 2 | 3072 | 2 | 808 | 2264
index info | pg_namespace_oid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_namespace_nspname_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_language_oid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_language_name_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_foreign_table_relid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_foreign_server_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_foreign_server_name_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_foreign_data_wrapper_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 40 | 984
index info | pg_foreign_data_wrapper_name_index | CacheMemoryContext | 2 | 1024 | 1 | 40 | 984
index info | pg_event_trigger_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_event_trigger_evtname_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_enum_typid_label_index | CacheMemoryContext | 2 | 2048 | 2 | 760 | 1288
index info | pg_enum_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_default_acl_role_nsp_obj_index | CacheMemoryContext | 2 | 3072 | 2 | 984 | 2088
index info | pg_conversion_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_constraint_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_conversion_name_nsp_index | CacheMemoryContext | 2 | 2048 | 2 | 760 | 1288
index info | pg_conversion_default_index | CacheMemoryContext | 2 | 3072 | 2 | 1168 | 1904
index info | pg_collation_oid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_collation_name_enc_nsp_index | CacheMemoryContext | 2 | 3072 | 2 | 944 | 2128
index info | pg_opclass_am_name_nsp_index | CacheMemoryContext | 2 | 3072 | 2 | 1088 | 1984
index info | pg_cast_source_target_index | CacheMemoryContext | 2 | 2048 | 2 | 544 | 1504
index info | pg_auth_members_role_member_index | CacheMemoryContext | 2 | 3072 | 2 | 1200 | 1872
index info | pg_attribute_relid_attnam_index | CacheMemoryContext | 2 | 2048 | 2 | 760 | 1288
index info | pg_amop_fam_strat_index | CacheMemoryContext | 2 | 3072 | 2 | 808 | 2264
index info | pg_amop_opr_fam_index | CacheMemoryContext | 2 | 3072 | 2 | 944 | 2128
index info | pg_aggregate_fnoid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_shseclabel_object_index | CacheMemoryContext | 2 | 3072 | 2 | 1232 | 1840
index info | pg_auth_members_member_role_index | CacheMemoryContext | 2 | 3072 | 2 | 1200 | 1872
index info | pg_authid_oid_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_authid_rolname_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_database_oid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_database_datname_index | CacheMemoryContext | 2 | 1024 | 1 | 72 | 952
index info | pg_trigger_tgrelid_tgname_index | CacheMemoryContext | 2 | 2048 | 2 | 760 | 1288
index info | pg_rewrite_rel_rulename_index | CacheMemoryContext | 2 | 2048 | 2 | 616 | 1432
index info | pg_amproc_fam_proc_index | CacheMemoryContext | 2 | 3072 | 2 | 808 | 2264
index info | pg_opclass_oid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_index_indexrelid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
index info | pg_attribute_relid_attnum_index | CacheMemoryContext | 2 | 2048 | 2 | 544 | 1504
index info | pg_class_oid_index | CacheMemoryContext | 2 | 2048 | 2 | 912 | 1136
WAL record construction | | TopMemoryContext | 1 | 49760 | 2 | 6376 | 43384
dynahash | PrivateRefCount | TopMemoryContext | 1 | 8192 | 1 | 2648 | 5544
MdSmgr | | TopMemoryContext | 1 | 8192 | 1 | 6776 | 1416
dynahash | LOCALLOCK hash | TopMemoryContext | 1 | 16384 | 2 | 4640 | 11744
GUCMemoryContext | | TopMemoryContext | 1 | 24576 | 2 | 12880 | 11696
dynahash | GUC hash table | GUCMemoryContext | 2 | 32768 | 3 | 12704 | 20064
dynahash | Timezones | TopMemoryContext | 1 | 104112 | 2 | 2648 | 101464
ErrorContext | | TopMemoryContext | 1 | 8192 | 1 | 7928 | 264
(133 rows)
postgres=#
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