一、前言
数据库日常运行过程中的性能监控和状态判别，是数据库日常的运行维护工作中重要部分之一。也是我们平时对数据库进行性能问题排查、系统优化的一个重要凭证。
Oracle数据库，通过AWR报告、ASH报告对数据库的某个时间段的运行状态及性能进行信息的收集和统计，然后判断这段时间的数据库运行性能瓶颈。究其根本，Oracle会在每隔1s（默认）收集当前数据库的非空闲等待事件信息、会话信息等，并存放于相关的ASH视图中。AWR报告则是每小时(默认、可设置)，对数据库的运行情况保存一个快照信息，在进行性能分析的时候，则可以通过awr相关视图或者awr报告获取到在一段事件内，数据库的运行情况。在9i前，AWR被称为statpack。在9i后，则被正式命名为awr。
但是对于postgreSQL来讲，目前并没有在其中集成类似于AWR的功能。因此，对于PostgreSQL，我们只能采取选用其他的工具包来实现该功能，从而帮助我们更好的监控、获取一个时间段内postgreSQL数据库的性能。
二、工具下载地址
pgstatpack，则是一个对于PostgreSQL非常好的性能分析工具，其部署简单轻便，使用方便。可以通过启用定时任务的方式，对PostgreSQL数据库保存快照，帮助用户进行比对分析。
目前，我们可以下载到的版本是：pgstatpack-2.3.3
下载地址：
http://www.xenialab.it/meo/web/pub/pgstatspack-2.3.3.zip
但是在使用测试过程中，发现该版本部分内容并不是特别完善，比如表、sql、索引等快照信息并没有收集。
所以，在使用的过程中，为了更贴近实际使用情况，我对该版本的工具包进行了进一步的优化，完善了报告内容、表收集内容、视图收集内容，以及生成快照、删除快照、生成报告的脚本。
新版本下载地址：
https://pan.baidu.com/s/1HhFkd0kL8G7PqVYW5YFCLg
验证码：alda
(大家可以直接下载下来使用，并根据实际情况进行修改)。
三、工具使用
1）简介
接下来，我对该工具的安装、使用方法等做一个简单的介绍：
在该工具中，核心文件主要是以下几个：
1.文件夹bin中，存放着三个.sh脚本
snapshot.sh
delete_snapshot.sh
pgstatpack_report.sh
其中，
snapshot.sh脚本，是通过linux主机的crontab进行设置，可以定时执行该脚本，为postgresql收集快照，用于记录快照时刻的数据库运行情况；
delete_snapshot.sh脚本，也是通过Linux主机的crontab进行设置，可以定时执行该脚本。为postgresql数据库删除历史快照；
pgstatpack_report.sh脚本，可以直接执行，获取相关快照中的信息，生成两个快照期间的数据库运行情况，类似于oracle的AWR报告。
2.sql文件夹文件夹sql中主要存放了创建各个快照的表信息、视图信息以及创建快照的函数、删除快照的函数、获取工具安装基础信息等。
主要文件如下：
pgstatspack_create_snap.sql，用于创建快照生成函数
pgstatspack_create_tables.sql，用于创建快照相关表、视图，做安装用
pgstatspack_delete_old_stats.sql，用于创建删除快照函数
pgstatspack_remove_tables.sql，用于删除快照表，做卸载用
3.install_pgstats.sh
该脚本主要用于安装工具
4.pgstatspack_stat_explanation.txt
该文本是对各个参数进行说明
2）安装
1.解压包
unzip pgstatspack-2.3.3.1.zip
2.使用具有Postgres数据库superadmin权限的用户执行脚本安装脚本：
sh install_pgstats.sh
输入postgresql端口即可
3）使用
为了方便使用，最开始我们需要把pg_stat_statements插件部署上
指定定时任务，收集快照：
crontab -e
#每分钟执行一次
/1 * * * * sh snapshot.sh
#所有快照保存30天
* 30 * * * * sh delete_snapshot.sh
生成报告：
sh pgstatpack_report.sh
输入数据库名字和数据库端口即可生成报告。
四、示例
安装成功后，可以看到的每个数据库中会存在以下表、视图、序列
postgres=# \d
List of relations
Schema | Name | Type | Owner
--------+---------------------------+----------+----------
public | pg_stat_statements | view | postgres
public | pgstatspack_activity | table | postgres
public | pgstatspack_activity_v | view | postgres
public | pgstatspack_bgwriter | table | postgres
public | pgstatspack_database | table | postgres
public | pgstatspack_database_v | view | postgres
public | pgstatspack_functions | table | postgres
public | pgstatspack_functions_v | view | postgres
public | pgstatspack_indexes | table | postgres
public | pgstatspack_indexes_v | view | postgres
public | pgstatspack_names | table | postgres
public | pgstatspack_sequences | table | postgres
public | pgstatspack_sequences_v | view | postgres
public | pgstatspack_settings | table | postgres
public | pgstatspack_settings_v | view | postgres
public | pgstatspack_snap | table | postgres
public | pgstatspack_space_usage | table | postgres
public | pgstatspack_space_usage_v | view | postgres
public | pgstatspack_statements | table | postgres
public | pgstatspack_statements_v | view | postgres
public | pgstatspack_tables | table | postgres
public | pgstatspack_tables_v | view | postgres
public | pgstatspack_version | table | postgres
public | pgstatspackid | sequence | postgres
public | pgstatspacknameid | sequence | postgres
(25 rows)
生成报告示例：
[postgres@postgresql11 bin]$ sh pgstatspack_report.sh
/home/soft/pgstatspack-2.3.3.1/bin /home/soft/pgstatspack-2.3.3.1/bin
Please specify a username:
postgres
Please specify a port:
15432
List of available databases:
1 . postgres
2 . wangxin
3 . wangxin1
Please select a number from the above list [ 1 - 3 ]
1
psql: invalid port number: "PGPORT"
pgstatspack_report.sh: line 129: [: -eq: unary operator expected
pgstatspack_report.sh: line 143: [: -lt: unary operator expected
snapid | ts | description
--------+----------------------------+---------------------
76 | 2020-11-06 17:22:01.172027 | cron based snapshot
75 | 2020-11-06 17:21:01.933611 | cron based snapshot
74 | 2020-11-06 17:20:01.253815 | cron based snapshot
42 | 2020-11-06 16:18:02.007747 | cron based snapshot
41 | 2020-11-06 16:17:01.780944 | cron based snapshot
40 | 2020-11-06 16:16:01.556158 | cron based snapshot
39 | 2020-11-06 16:15:01.337829 | cron based snapshot
38 | 2020-11-06 16:14:01.097114 | cron based snapshot
37 | 2020-11-06 16:13:01.866499 | cron based snapshot
36 | 2020-11-06 16:12:01.616422 | cron based snapshot
35 | 2020-11-06 16:11:01.336428 | cron based snapshot
34 | 2020-11-06 16:10:02.075392 | cron based snapshot
33 | 2020-11-06 16:09:01.828527 | cron based snapshot
32 | 2020-11-06 16:08:01.539675 | cron based snapshot
31 | 2020-11-06 16:07:01.246791 | cron based snapshot
30 | 2020-11-06 16:06:01.994279 | cron based snapshot
29 | 2020-11-06 16:05:01.697285 | cron based snapshot
28 | 2020-11-06 16:04:01.412084 | cron based snapshot
27 | 2020-11-06 16:03:02.09771 | cron based snapshot
26 | 2020-11-06 16:02:01.81457 | cron based snapshot
25 | 2020-11-06 16:01:01.515131 | cron based snapshot
24 | 2020-11-06 16:00:01.134459 | cron based snapshot
23 | 2020-11-06 15:59:01.840724 | cron based snapshot
22 | 2020-11-06 15:58:01.594782 | cron based snapshot
21 | 2020-11-06 15:57:01.262691 | cron based snapshot
20 | 2020-11-06 15:56:02.03767 | cron based snapshot
19 | 2020-11-06 15:55:01.688383 | cron based snapshot
18 | 2020-11-06 15:54:01.384491 | cron based snapshot
17 | 2020-11-06 15:53:01.131956 | cron based snapshot
16 | 2020-11-06 15:52:01.885006 | cron based snapshot
15 | 2020-11-06 15:51:01.602279 | cron based snapshot
14 | 2020-11-06 15:50:01.343534 | cron based snapshot
13 | 2020-11-06 15:49:01.105154 | cron based snapshot
12 | 2020-11-06 15:48:01.88585 | cron based snapshot
11 | 2020-11-06 15:47:01.648536 | cron based snapshot
10 | 2020-11-06 15:46:01.401738 | cron based snapshot
9 | 2020-11-06 15:45:01.136869 | cron based snapshot
8 | 2020-11-06 15:44:01.865318 | cron based snapshot
7 | 2020-11-06 15:43:57.590552 | cron based snapshot
6 | 2020-11-05 17:39:01.714187 | cron based snapshot
5 | 2020-11-05 17:38:01.48115 | cron based snapshot
4 | 2020-11-05 17:37:01.232256 | cron based snapshot
3 | 2020-11-05 17:36:02.012466 | cron based snapshot
2 | 2020-11-05 17:35:01.762274 | cron based snapshot
1 | 2020-11-05 17:34:01.473805 | cron based snapshot
(45 rows)
Enter start snapshot id : 75
Enter stop snapshot id : 76
Using file name: /tmp/pgstatreport_postgres_75_76.txt
###########################################################################################################
PGStatspack version 2.3.3.1 by [email protected]
###########################################################################################################
Snapshot information
Begin snapshot :
snapid | ts | description
--------+----------------------------+---------------------
75 | 2020-11-06 17:21:01.933611 | cron based snapshot
(1 row)
End snapshot :
snapid | ts | description
--------+----------------------------+---------------------
76 | 2020-11-06 17:22:01.172027 | cron based snapshot
(1 row)
Seconds in snapshot: 59.238416
Database version
version
---------------------------------------------------------------------------------------------------------
PostgreSQL 11.4 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36), 64-bit
(1 row)
Database information
current_database | dbsize
------------------+--------
postgres | 181 MB
(1 row)
Database statistics
database | tps | hitrate | lio_ps | pio_ps | rollbk_ps
-----------+-----+---------+--------+--------+-----------
postgres | 6 | 99.00 | 139.94 | 0.20 | 0.00
wangxin | 4 | 99.00 | 132.22 | 0.17 | 0.00
wangxin1 | 4 | 99.00 | 133.25 | 0.19 | 0.00
template1 | 0 | 0 | 0.00 | 0.00 | 0.00
template0 | 0 | 0 | 0.00 | 0.00 | 0.00
(5 rows)
Database tuples information:
database | tup | tup_pct_ins | tup_pct_upd | tup_pct_del
----------+-------+-------------+-------------+-------------
postgres | 40076 | 0 | 0 | 0
(1 row)
Top 20 tables ordered by table size changes
table | table_growth | index_growth
-------------------------+--------------+--------------
pgstatspack_settings | 24576 | 8192
pgstatspack_tables | 16384 | 8192
pgstatspack_indexes | 16384 | 8192
pgstatspack_statements | 8192 | 0
pg_type | 0 | 0
pg_policy | 0 | 0
pg_opclass | 0 | 0
pg_ts_config | 0 | 0
pg_toast_13122 | 0 | 0
pg_toast_13137 | 0 | 0
pg_db_role_setting | 0 | 0
pg_foreign_data_wrapper | 0 | 0
pg_largeobject | 0 | 0
pg_toast_42602 | 0 | 0
pg_constraint | 0 | 0
pg_ts_parser | 0 | 0
pg_shdescription | 0 | 0
pg_toast_13127 | 0 | 0
pg_opfamily | 0 | 0
pg_publication | 0 | 0
(20 rows)
Top 20 tables ordered by high table to index read ratio
table | system_read_pct | table_read_pct | index_read_pct
-------------------+-----------------+----------------+----------------
pg_proc | 45 | 98 | 1
pg_class | 37 | 85 | 14
pg_index | 5 | 90 | 9
pg_attribute | 3 | 0 | 100
pg_opclass | 3 | 0 | 100
pg_am | 0 | 100 | 0
pg_authid | 0 | 89 | 10
pg_namespace | 0 | 85 | 14
pg_database | 0 | 75 | 24
pgstatspack_names | 0 | 43 | 56
pg_cast | 0 | 0 | 100
pg_statistic | 0 | 0 | 100
pg_language | 0 | 0 | 100
pg_rewrite | 0 | 0 | 100
pg_attrdef | 0 | 0 | 100
pg_sequence | 0 | 0 | 100
pg_aggregate | 0 | 0 | 100
pg_type | 0 | 0 | 100
pg_amop | 0 | 0 | 100
pg_toast_2618 | 0 | 0 | 100
(20 rows)
Top 20 tables ordered by inserts
table | table_inserts
-------------------------+---------------
pgstatspack_settings | 299
pgstatspack_indexes | 151
pgstatspack_tables | 106
pgstatspack_statements | 53
pgstatspack_space_usage | 5
pgstatspack_database | 5
pgstatspack_activity | 2
pgstatspack_sequences | 2
pgstatspack_functions | 2
pgstatspack_snap | 1
pgstatspack_bgwriter | 1
pg_largeobject | 0
pg_policy | 0
pg_toast_42602 | 0
pg_foreign_data_wrapper | 0
pg_db_role_setting | 0
pg_type | 0
pg_opclass | 0
pg_toast_13137 | 0
pg_ts_config | 0
(20 rows)
Top 20 tables ordered by updates
table | table_updates
-------------------------+---------------
pg_foreign_server | 0
pg_opclass | 0
pg_aggregate | 0
pg_toast_13122 | 0
pg_type | 0
pg_policy | 0
pg_publication | 0
pg_ts_parser | 0
pgstatspack_statements | 0
pg_toast_13137 | 0
pg_db_role_setting | 0
pg_foreign_data_wrapper | 0
pg_largeobject | 0
pg_toast_42602 | 0
pg_opfamily | 0
pg_shdescription | 0
pg_constraint | 0
pg_toast_13127 | 0
pg_ts_config | 0
pg_foreign_table | 0
(20 rows)
Top 20 tables ordered by deletes
table | table_deletes
-------------------------+---------------
pg_foreign_server | 0
pg_opclass | 0
pg_aggregate | 0
pg_toast_13122 | 0
pg_type | 0
pg_policy | 0
pg_publication | 0
pg_ts_parser | 0
pgstatspack_statements | 0
pg_toast_13137 | 0
pg_db_role_setting | 0
pg_foreign_data_wrapper | 0
pg_largeobject | 0
pg_toast_42602 | 0
pg_opfamily | 0
pg_shdescription | 0
pg_constraint | 0
pg_toast_13127 | 0
pg_ts_config | 0
pg_foreign_table | 0
(20 rows)
Tables ordered by percentage of tuples scanned
table | rows_read_pct | tab_hitrate | idx_hitrate | tab_read | tab_hit | idx_read | idx_hit
-------------------+---------------+-------------+-------------+----------+---------+----------+---------
pg_proc | 45 | 99 | 99 | 0 | 690 | 0 | 422
pg_class | 37 | 99 | 99 | 0 | 2670 | 0 | 4650
pg_index | 5 | 99 | 99 | 0 | 268 | 0 | 222
pg_attribute | 3 | 99 | 99 | 0 | 670 | 0 | 1326
pg_opclass | 3 | 99 | 99 | 0 | 596 | 0 | 100
pg_namespace | 0 | 95 | 95 | 0 | 20 | 0 | 20
pg_toast_2619 | 0 | 50 | 66 | 0 | 1 | 0 | 2
pg_tablespace | 0 | 93 | 95 | 0 | 14 | 0 | 22
pg_database | 0 | 99 | 99 | 0 | 130 | 0 | 106
pg_operator | 0 | 99 | 99 | 0 | 162 | 0 | 150
pg_amproc | 0 | 98 | 99 | 0 | 54 | 0 | 122
pg_am | 0 | 85 | 0 | 0 | 6 | 0 | 0
pg_toast_1255 | 0 | 66 | 75 | 0 | 2 | 0 | 3
pg_cast | 0 | 98 | 99 | 0 | 60 | 0 | 358
pg_statistic | 0 | 92 | 97 | 0 | 13 | 0 | 40
pg_language | 0 | 66 | 80 | 0 | 2 | 0 | 4
pgstatspack_names | 0 | 98 | 98 | 0 | 50 | 0 | 50
pg_rewrite | 0 | 96 | 96 | 0 | 28 | 0 | 28
pg_authid | 0 | 96 | 96 | 0 | 30 | 0 | 32
pg_attrdef | 0 | 66 | 80 | 0 | 2 | 0 | 4
pg_sequence | 0 | 50 | 66 | 0 | 1 | 0 | 2
pg_aggregate | 0 | 75 | 80 | 0 | 3 | 0 | 4
pg_type | 0 | 99 | 99 | 0 | 136 | 0 | 302
pg_amop | 0 | 99 | 99 | 0 | 261 | 0 | 360
pg_toast_2618 | 0 | 91 | 90 | 0 | 11 | 0 | 9
(25 rows)
Indexes ordered by scans
index | table | scans | tup_read | tup_fetch | idx_blks_read | idx_blks_hit
-----------------------------------------------+-------------------------+-------+----------+-----------+---------------+--------------
pg_class_oid_index | pg_class | 726 | 726 | 726 | 0 | 1459
pg_attribute_relid_attnum_index | pg_attribute | 328 | 790 | 790 | 0 | 663
pg_cast_source_target_index | pg_cast | 177 | 30 | 30 | 0 | 179
pg_proc_oid_index | pg_proc | 95 | 95 | 95 | 0 | 192
pg_index_indexrelid_index | pg_index | 85 | 85 | 85 | 0 | 88
pg_type_oid_index | pg_type | 65 | 64 | 64 | 0 | 132
pg_class_relname_nsp_index | pg_class | 44 | 30 | 30 | 0 | 90
pg_amop_fam_strat_index | pg_amop | 38 | 38 | 38 | 0 | 78
pg_amproc_fam_proc_index | pg_amproc | 29 | 40 | 40 | 0 | 61
pg_opclass_oid_index | pg_opclass | 29 | 29 | 29 | 0 | 32
pg_db_role_setting_databaseid_rol_index | pg_db_role_setting | 28 | 0 | 0 | 0 | 28
pg_database_datname_index | pg_database | 26 | 26 | 26 | 0 | 33
idx_pgstatspack_names_name | pgstatspack_names | 23 | 23 | 23 | 0 | 24
pg_operator_oid_index | pg_operator | 21 | 21 | 21 | 0 | 44
pg_index_indrelid_index | pg_index | 21 | 30 | 30 | 0 | 23
pg_amop_opr_fam_index | pg_amop | 20 | 51 | 51 | 0 | 42
pg_statistic_relid_att_inh_index | pg_statistic | 19 | 13 | 13 | 0 | 40
pg_opclass_am_name_nsp_index | pg_opclass | 17 | 717 | 717 | 0 | 18
pg_operator_oprname_l_r_n_index | pg_operator | 14 | 84 | 84 | 0 | 31
pg_rewrite_rel_rulename_index | pg_rewrite | 13 | 15 | 15 | 0 | 14
pg_database_oid_index | pg_database | 13 | 13 | 13 | 0 | 20
pg_proc_proname_args_nsp_index | pg_proc | 9 | 26 | 26 | 0 | 19
pg_type_typname_nsp_index | pg_type | 9 | 4 | 4 | 0 | 19
pg_statistic_ext_relid_index | pg_statistic_ext | 8 | 0 | 0 | 0 | 8
pg_toast_2618_index | pg_toast_2618 | 8 | 24 | 24 | 0 | 9
pg_tablespace_oid_index | pg_tablespace | 7 | 7 | 7 | 0 | 11
pg_namespace_nspname_index | pg_namespace | 7 | 5 | 5 | 0 | 9
pg_authid_oid_index | pg_authid | 4 | 4 | 4 | 0 | 8
pg_authid_rolname_index | pg_authid | 4 | 4 | 4 | 0 | 8
pg_aggregate_fnoid_index | pg_aggregate | 3 | 3 | 3 | 0 | 4
pg_constraint_conrelid_contypid_conname_index | pg_constraint | 3 | 0 | 0 | 0 | 4
pg_toast_1255_index | pg_toast_1255 | 2 | 4 | 4 | 0 | 3
pg_attrdef_adrelid_adnum_index | pg_attrdef | 1 | 1 | 1 | 0 | 2
pg_toast_2619_index | pg_toast_2619 | 1 | 1 | 1 | 0 | 2
pg_language_oid_index | pg_language | 1 | 1 | 1 | 0 | 2
pg_sequence_seqrelid_index | pg_sequence | 1 | 1 | 1 | 0 | 2
pgstatspack_indexes_pk | pgstatspack_indexes | 0 | 0 | 0 | 1 | 304
pgstatspack_sequences_pk | pgstatspack_sequences | 0 | 0 | 0 | 0 | 3
pgstatspack_settings_pk | pgstatspack_settings | 0 | 0 | 0 | 1 | 600
pgstatspack_statements_pk | pgstatspack_statements | 0 | 0 | 0 | 0 | 107
pgstatspack_functions_pk | pgstatspack_functions | 0 | 0 | 0 | 1 | 2
pgstatspack_bgwriter_pk | pgstatspack_bgwriter | 0 | 0 | 0 | 0 | 2
pgstatspack_activity_pkey | pgstatspack_activity | 0 | 0 | 0 | 0 | 3
pgstatspack_space_usage_pk | pgstatspack_space_usage | 0 | 0 | 0 | 0 | 6
pgstatspack_names_pkey | pgstatspack_names | 0 | 0 | 0 | 0 | 1
pg_class_tblspc_relfilenode_index | pg_class | 0 | 0 | 0 | 0 | 1
pg_namespace_oid_index | pg_namespace | 0 | 0 | 0 | 0 | 1
pgstatspack_database_pk | pgstatspack_database | 0 | 0 | 0 | 0 | 6
pgstatspack_tables_pk | pgstatspack_tables | 0 | 0 | 0 | 1 | 214
(49 rows)
Sequences ordered by blks_read
sequence | blks_read | blks_hit
---------------+-----------+----------
pgstatspackid | 0 | 1
(1 row)
Top 20 SQL statements ordered by total_time
calls | total_time | rows | user | query
-------+------------+------+----------+-----------------------------------------------------------
6 | 0.63 | 6 | postgres | select cast(substring(version(), $1) as int)
6 | 0.63 | 6 | postgres | select cast(substring(version(), $1) as int)
6 | 0.63 | 6 | postgres | select cast(substring(version(), $1) as int)
6 | 0.63 | 6 | postgres | select cast(substring(version(), $1) as int)
6 | 0.63 | 6 | postgres | select cast(substring(version(), $1) as int)
6 | 0.63 | 6 | postgres | select cast(substring(version(), $1) as int)
6 | 0.63 | 6 | postgres | select cast(substring(version(), $1) as int)
6 | 0.63 | 6 | postgres | select cast(substring(version(), $1) as int)
6 | 0.63 | 6 | postgres | select cast(substring(version(), $1) as int)
3 | 0.17 | 3 | postgres | SELECT nextval($1)
3 | 0.17 | 3 | postgres | SELECT nextval($1)
3 | 0.17 | 3 | postgres | SELECT nextval($1)
3 | 0.17 | 3 | postgres | SELECT nextval($1)
3 | 0.17 | 3 | postgres | SELECT nextval($1)
3 | 0.17 | 3 | postgres | SELECT nextval($1)
3 | 0.17 | 3 | postgres | SELECT nextval($1)
3 | 0.17 | 3 | postgres | SELECT nextval($1)
3 | 0.17 | 3 | postgres | SELECT nextval($1)
1 | 0.02 | 3 | postgres | select datname from pg_database where datname not like $1
3 | 0.01 | 3 | postgres | SELECT current_timestamp
(20 rows)
Top 20 user functions ordered by total_time
funcid | function_name | calls | total_time | self_time
--------+---------------------------+-------+------------+-----------
50769 | public.pgstatspack_snap | 1 | 49.000 | 49.000
24587 | public.pg_stat_statements | 1 | 0.000 | 0.000
(2 rows)
background writer stats
checkpoints_timed | checkpoints_req | buffers_checkpoint | buffers_clean | maxwritten_clean | buffers_backend | buffers_alloc
-------------------+-----------------+--------------------+---------------+------------------+-----------------+---------------
0 | 0 | 0 | 0 | 0 | 0 | 33
(1 row)
background writer relative stats
checkpoints_timed | minutes_between_checkpoint | buffers_checkpoint | buffers_clean | buffers_backend | total_writes | avg_checkpoint_write
-------------------+----------------------------+--------------------+---------------+-----------------+--------------+----------------------
| | | | | 0.000 MB/s |
(1 row)
activity stats
current_sessions | current_active_sessions | old_sessions | old_active_sessions | delta_sessions | delta_active_sessions
------------------+-------------------------+--------------+---------------------+----------------+-----------------------
2 | 1 | 1 | 1 | 1 | 0
(1 row)
Parameters
name | start_setting | stop_setting | source
----------------------------------------+--------------------------------+--------------------------------+----------------------
allow_system_table_mods | off | off | default
application_name | psql | psql | client
archive_command | (disabled) | (disabled) | default
archive_mode | off | off | default
archive_timeout | 0 | 0 | default
array_nulls | on | on | default
authentication_timeout | 60 | 60 | default
autovacuum | on | on | default
autovacuum_analyze_scale_factor | 0.1 | 0.1 | default
autovacuum_analyze_threshold | 50 | 50 | default
autovacuum_freeze_max_age | 200000000 | 200000000 | default
autovacuum_max_workers | 3 | 3 | default
autovacuum_multixact_freeze_max_age | 400000000 | 400000000 | default
autovacuum_naptime | 60 | 60 | default
autovacuum_vacuum_cost_delay | 20 | 20 | default
autovacuum_vacuum_cost_limit | -1 | -1 | default
autovacuum_vacuum_scale_factor | 0.2 | 0.2 | default
autovacuum_vacuum_threshold | 50 | 50 | default
autovacuum_work_mem | -1 | -1 | default
backend_flush_after | 0 | 0 | default
backslash_quote | safe_encoding | safe_encoding | default
bgwriter_delay | 200 | 200 | default
bgwriter_flush_after | 64 | 64 | default
bgwriter_lru_maxpages | 100 | 100 | default
bgwriter_lru_multiplier | 2 | 2 | default
block_size | 8192 | 8192 | default
bonjour | off | off | default
bonjour_name | | | default
bytea_output | hex | hex | default
check_function_bodies | on | on | default
checkpoint_completion_target | 0.5 | 0.5 | default
checkpoint_flush_after | 32 | 32 | default
checkpoint_timeout | 300 | 300 | default
checkpoint_warning | 30 | 30 | default
client_encoding | UTF8 | UTF8 | default
client_min_messages | notice | notice | default
cluster_name | | | default
commit_delay | 0 | 0 | default
commit_siblings | 5 | 5 | default
config_file | /PgData/postgresql.conf | /PgData/postgresql.conf | override
constraint_exclusion | partition | partition | default
cpu_index_tuple_cost | 0.005 | 0.005 | default
cpu_operator_cost | 0.0025 | 0.0025 | default
cpu_tuple_cost | 0.01 | 0.01 | default
cursor_tuple_fraction | 0.1 | 0.1 | default
data_checksums | off | off | override
data_directory | /PgData | /PgData | override
data_directory_mode | 0700 | 0700 | default
data_sync_retry | off | off | default
DateStyle | ISO, MDY | ISO, MDY | configuration file
db_user_namespace | off | off | default
deadlock_timeout | 1000 | 1000 | default
debug_assertions | off | off | default
debug_pretty_print | on | on | default
debug_print_parse | off | off | default
debug_print_plan | off | off | default
debug_print_rewritten | off | off | default
default_statistics_target | 100 | 100 | default
default_tablespace | | | default
default_text_search_config | pg_catalog.english | pg_catalog.english | configuration file
default_transaction_deferrable | off | off | default
default_transaction_isolation | read committed | read committed | default
default_transaction_read_only | off | off | default
default_with_oids | off | off | default
dynamic_library_path | $libdir | $libdir | default
dynamic_shared_memory_type | posix | posix | configuration file
effective_cache_size | 524288 | 524288 | default
effective_io_concurrency | 1 | 1 | default
enable_bitmapscan | on | on | default
enable_gathermerge | on | on | default
enable_hashagg | on | on | default
enable_hashjoin | on | on | default
enable_indexonlyscan | on | on | default
enable_indexscan | on | on | default
enable_material | on | on | default
enable_mergejoin | on | on | default
enable_nestloop | on | on | default
enable_parallel_append | on | on | default
enable_parallel_hash | on | on | default
enable_partition_pruning | on | on | default
enable_partitionwise_aggregate | off | off | default
enable_partitionwise_join | off | off | default
enable_seqscan | on | on | default
enable_sort | on | on | default
enable_tidscan | on | on | default
escape_string_warning | on | on | default
event_source | PostgreSQL | PostgreSQL | default
exit_on_error | off | off | default
external_pid_file | | | default
extra_float_digits | 0 | 0 | default
force_parallel_mode | off | off | default
from_collapse_limit | 8 | 8 | default
fsync | on | on | default
full_page_writes | on | on | default
geqo | on | on | default
geqo_effort | 5 | 5 | default
geqo_generations | 0 | 0 | default
geqo_pool_size | 0 | 0 | default
geqo_seed | 0 | 0 | default
geqo_selection_bias | 2 | 2 | default
geqo_threshold | 12 | 12 | default
gin_fuzzy_search_limit | 0 | 0 | default
gin_pending_list_limit | 4096 | 4096 | default
hba_file | /PgData/pg_hba.conf | /PgData/pg_hba.conf | override
hot_standby | on | on | default
hot_standby_feedback | off | off | default
huge_pages | try | try | default
ident_file | /PgData/pg_ident.conf | /PgData/pg_ident.conf | override
idle_in_transaction_session_timeout | 0 | 0 | default
ignore_checksum_failure | off | off | default
ignore_system_indexes | off | off | default
integer_datetimes | on | on | default
IntervalStyle | postgres | postgres | default
jit | off | off | default
jit_above_cost | 100000 | 100000 | default
jit_debugging_support | off | off | default
jit_dump_bitcode | off | off | default
jit_expressions | on | on | default
jit_inline_above_cost | 500000 | 500000 | default
jit_optimize_above_cost | 500000 | 500000 | default
jit_profiling_support | off | off | default
jit_provider | llvmjit | llvmjit | default
jit_tuple_deforming | on | on | default
join_collapse_limit | 8 | 8 | default
krb_caseins_users | off | off | default
krb_server_keyfile | | | default
lc_collate | en_US.UTF-8 | en_US.UTF-8 | override
lc_ctype | en_US.UTF-8 | en_US.UTF-8 | override
lc_messages | en_US.UTF-8 | en_US.UTF-8 | configuration file
lc_monetary | en_US.UTF-8 | en_US.UTF-8 | configuration file
lc_numeric | en_US.UTF-8 | en_US.UTF-8 | configuration file
lc_time | en_US.UTF-8 | en_US.UTF-8 | configuration file
listen_addresses | * | * | configuration file
local_preload_libraries | | | default
lock_timeout | 0 | 0 | default
lo_compat_privileges | off | off | default
log_autovacuum_min_duration | -1 | -1 | default
log_checkpoints | off | off | default
log_connections | off | off | default
log_destination | csvlog | csvlog | configuration file
log_directory | /PgData/pg_log | /PgData/pg_log | configuration file
log_disconnections | off | off | default
log_duration | off | off | default
log_error_verbosity | default | default | default
log_executor_stats | off | off | default
log_file_mode | 0600 | 0600 | default
log_filename | postgresql-%Y-%m-%d_%H%M%S.log | postgresql-%Y-%m-%d_%H%M%S.log | configuration file
logging_collector | on | on | configuration file
log_hostname | off | off | default
log_line_prefix | %t | %t | configuration file
log_lock_waits | off | off | default
log_min_duration_statement | -1 | -1 | default
log_min_error_statement | error | error | default
log_min_messages | warning | warning | default
log_parser_stats | off | off | default
log_planner_stats | off | off | default
log_replication_commands | off | off | default
log_rotation_age | 1440 | 1440 | configuration file
log_rotation_size | 10240 | 10240 | default
log_statement | none | none | default
log_statement_stats | off | off | default
log_temp_files | -1 | -1 | default
log_timezone | PRC | PRC | configuration file
log_truncate_on_rotation | off | off | default
maintenance_work_mem | 65536 | 65536 | default
max_connections | 100 | 100 | configuration file
max_files_per_process | 1000 | 1000 | default
max_function_args | 100 | 100 | default
max_identifier_length | 63 | 63 | default
max_index_keys | 32 | 32 | default
max_locks_per_transaction | 64 | 64 | default
max_logical_replication_workers | 4 | 4 | default
max_parallel_maintenance_workers | 2 | 2 | default
max_parallel_workers | 8 | 8 | default
max_parallel_workers_per_gather | 2 | 2 | default
max_pred_locks_per_page | 2 | 2 | default
max_pred_locks_per_relation | -2 | -2 | default
max_pred_locks_per_transaction | 64 | 64 | default
max_prepared_transactions | 0 | 0 | default
max_replication_slots | 10 | 10 | default
max_stack_depth | 2048 | 2048 | environment variable
max_standby_archive_delay | 30000 | 30000 | default
max_standby_streaming_delay | 30000 | 30000 | default
max_sync_workers_per_subscription | 2 | 2 | default
max_wal_senders | 3 | 3 | configuration file
max_wal_size | 1024 | 1024 | configuration file
max_worker_processes | 8 | 8 | default
min_parallel_index_scan_size | 64 | 64 | default
min_parallel_table_scan_size | 1024 | 1024 | default
min_wal_size | 80 | 80 | configuration file
old_snapshot_threshold | -1 | -1 | default
operator_precedence_warning | off | off | default
parallel_leader_participation | on | on | default
parallel_setup_cost | 1000 | 1000 | default
parallel_tuple_cost | 0.1 | 0.1 | default
password_encryption | md5 | md5 | default
pg_stat_statements.max | 10000 | 10000 | configuration file
pg_stat_statements.save | on | on | configuration file
pg_stat_statements.track | all | all | configuration file
pg_stat_statements.track_utility | on | on | configuration file
plpgsql.check_asserts | on | on | default
plpgsql.extra_errors | none | none | default
plpgsql.extra_warnings | none | none | default
plpgsql.print_strict_params | off | off | default
plpgsql.variable_conflict | error | error | default
port | 15432 | 15432 | configuration file
post_auth_delay | 0 | 0 | default
pre_auth_delay | 0 | 0 | default
quote_all_identifiers | off | off | default
random_page_cost | 4 | 4 | default
restart_after_crash | on | on | default
row_security | on | on | default
search_path | "$user", public | "$user", public | default
segment_size | 131072 | 131072 | default
seq_page_cost | 1 | 1 | default
server_encoding | UTF8 | UTF8 | override
server_version | 11.4 | 11.4 | default
server_version_num | 110004 | 110004 | default
session_preload_libraries | | | default
session_replication_role | origin | origin | default
shared_buffers | 32768 | 32768 | configuration file
shared_preload_libraries | pg_stat_statements | pg_stat_statements | configuration file
ssl | off | off | default
ssl_ca_file | | | default
ssl_cert_file | server.crt | server.crt | default
ssl_ciphers | none | none | default
ssl_crl_file | | | default
ssl_dh_params_file | | | default
ssl_ecdh_curve | none | none | default
ssl_key_file | server.key | server.key | default
ssl_passphrase_command | | | default
ssl_passphrase_command_supports_reload | off | off | default
ssl_prefer_server_ciphers | on | on | default
standard_conforming_strings | on | on | default
statement_timeout | 0 | 0 | default
stats_temp_directory | pg_stat_tmp | pg_stat_tmp | default
superuser_reserved_connections | 5 | 5 | configuration file
synchronize_seqscans | on | on | default
synchronous_commit | on | on | default
synchronous_standby_names | | | default
syslog_facility | local0 | local0 | default
syslog_ident | postgres | postgres | default
syslog_sequence_numbers | on | on | default
syslog_split_messages | on | on | default
tcp_keepalives_count | 0 | 0 | configuration file
tcp_keepalives_idle | 0 | 0 | configuration file
tcp_keepalives_interval | 0 | 0 | configuration file
temp_buffers | 1024 | 1024 | default
temp_file_limit | -1 | -1 | default
temp_tablespaces | | | default
TimeZone | PRC | PRC | configuration file
timezone_abbreviations | Default | Default | default
trace_notify | off | off | default
trace_recovery_messages | log | log | default
trace_sort | off | off | default
track_activities | on | on | default
track_activity_query_size | 1024 | 1024 | default
track_commit_timestamp | off | off | default
track_counts | on | on | default
track_functions | all | all | configuration file
track_io_timing | on | on | configuration file
transaction_deferrable | off | off | override
transaction_isolation | read committed | read committed | override
transaction_read_only | off | off | override
transform_null_equals | off | off | default
unix_socket_directories | /tmp | /tmp | default
unix_socket_group | | | default
unix_socket_permissions | 0700 | 0700 | configuration file
update_process_title | on | on | default
vacuum_cleanup_index_scale_factor | 0.1 | 0.1 | default
vacuum_cost_delay | 0 | 0 | default
vacuum_cost_limit | 200 | 200 | default
vacuum_cost_page_dirty | 20 | 20 | default
vacuum_cost_page_hit | 1 | 1 | default
vacuum_cost_page_miss | 10 | 10 | default
vacuum_defer_cleanup_age | 0 | 0 | default
vacuum_freeze_min_age | 50000000 | 50000000 | default
vacuum_freeze_table_age | 150000000 | 150000000 | default
vacuum_multixact_freeze_min_age | 5000000 | 5000000 | default
vacuum_multixact_freeze_table_age | 150000000 | 150000000 | default
wal_block_size | 8192 | 8192 | default
wal_buffers | 1024 | 1024 | override
wal_compression | off | off | default
wal_consistency_checking | | | default
wal_keep_segments | 0 | 0 | default
wal_level | replica | replica | default
wal_log_hints | off | off | default
wal_receiver_status_interval | 10 | 10 | default
wal_receiver_timeout | 60000 | 60000 | default
wal_retrieve_retry_interval | 5000 | 5000 | default
wal_segment_size | 16777216 | 16777216 | override
wal_sender_timeout | 60000 | 60000 | default
wal_sync_method | fdatasync | fdatasync | default
wal_writer_delay | 200 | 200 | default
wal_writer_flush_after | 128 | 128 | default
work_mem | 4096 | 4096 | default
xmlbinary | base64 | base64 | default
xmloption | content | content | default
zero_damaged_pages | off | off | default
(299 rows)
This report is saved as /tmp/pgstatreport_postgres_75_76.txt
/home/soft/pgstatspack-2.3.3.1/bin