pgpool 通过统计信息查看数据插入

192.168.16.112是pgpool的vip，192.168.16.110是节点1(主节点)的IP，192.168.16.111是备节点的IP。

[postgres@pgpool01 ~]$ psql -h 192.168.16.112 -p 9999 -d test

psql (9.5.6)

Type "help" for help.

test=# \dt

              List of relations

 Schema |       Name       | Type  |  Owner   

--------+------------------+-------+----------

 public | pgbench_accounts | table | postgres

 public | pgbench_branches | table | postgres

 public | pgbench_history  | table | postgres

 public | pgbench_tellers  | table | postgres

(4 rows)

重置当前数据库的所有统计计数器

test=# select pg_stat_reset();

 pg_stat_reset 

---------------

 

(1 row)

查询以下表被插入的行数，被更新的行数，被删除的行数

[postgres@pgpool01 ~]$ psql -p 5432 -d test

psql (9.5.6)

Type "help" for help.

test=# select relname,n_tup_ins,n_tup_upd,n_tup_del  from pg_stat_user_tables;

     relname      | n_tup_ins | n_tup_upd | n_tup_del 

------------------+-----------+-----------+-----------

 pgbench_tellers  |         0 |         0 |         0

 pgbench_accounts |         0 |         0 |         0

 pgbench_history  |         0 |         0 |         0

 pgbench_branches |         0 |         0 |         0

 insert_lock      |         0 |         0 |         0

(5 rows)

[postgres@pgpool02 ~]$ psql -p 5433 -d test

psql (9.5.6)

Type "help" for help.

test=# select relname,n_tup_ins,n_tup_upd,n_tup_del  from pg_stat_user_tables;

     relname      | n_tup_ins | n_tup_upd | n_tup_del 

------------------+-----------+-----------+-----------

 pgbench_tellers  |         0 |         0 |         0

 pgbench_accounts |         0 |         0 |         0

 pgbench_history  |         0 |         0 |         0

 pgbench_branches |         0 |         0 |         0

 insert_lock      |         0 |         0 |         0

(5 rows)

[postgres@pgpool01 ~]$ pgbench -h 192.168.16.112 -p 9999 -T 2 test

starting vacuum...end.

transaction type: TPC-B (sort of)

scaling factor: 1

query mode: simple

number of clients: 1

number of threads: 1

duration: 2 s

number of transactions actually processed: 202

latency average: 9.902 ms

tps = 100.991012 (including connections establishing)

tps = 102.044992 (excluding connections establishing)

[postgres@pgpool01 ~]$ psql -h 192.168.16.112 -p 9999 -d test

psql (9.5.6)

Type "help" for help.

test=# select relname,n_tup_ins,n_tup_upd,n_tup_del  from pg_stat_user_tables;

     relname      | n_tup_ins | n_tup_upd | n_tup_del 

------------------+-----------+-----------+-----------

 pgbench_tellers  |         0 |       202 |         0

 pgbench_accounts |         0 |       202 |         0

 pgbench_history  |       202 |         0 |         0

 pgbench_branches |         0 |       202 |         0

 insert_lock      |         0 |         0 |         0

(5 rows)

[postgres@pgpool01 ~]$ psql -p 5432 -d test

psql (9.5.6)

Type "help" for help.

test=# select relname,n_tup_ins,n_tup_upd,n_tup_del  from pg_stat_user_tables;

     relname      | n_tup_ins | n_tup_upd | n_tup_del 

------------------+-----------+-----------+-----------

 pgbench_tellers  |         0 |       202 |         0

 pgbench_accounts |         0 |       202 |         0

 pgbench_history  |       202 |         0 |         0

 pgbench_branches |         0 |       202 |         0

 insert_lock      |         0 |         0 |         0

(5 rows)

[postgres@pgpool02 ~]$ psql -p 5433 -d test

psql (9.5.6)

Type "help" for help.

test=# select relname,n_tup_ins,n_tup_upd,n_tup_del  from pg_stat_user_tables;

     relname      | n_tup_ins | n_tup_upd | n_tup_del 

------------------+-----------+-----------+-----------

 pgbench_tellers  |         0 |         0 |         0

 pgbench_accounts |         0 |         0 |         0

 pgbench_history  |         0 |         0 |         0

 pgbench_branches |         0 |         0 |         0

 insert_lock      |         0 |         0 |         0

(5 rows)

重置当前数据库的所有统计计数器

[postgres@pgpool01 ~]$ psql -p 5432 -d test

psql (9.5.6)

Type "help" for help.

test=# select pg_stat_reset();

 pg_stat_reset 

---------------

 

(1 row)

[postgres@pgpool02 ~]$ pgbench -h 192.168.16.112 -p 9999 -T 2 test

starting vacuum...end.

transaction type: TPC-B (sort of)

scaling factor: 1

query mode: simple

number of clients: 1

number of threads: 1

duration: 2 s

number of transactions actually processed: 186

latency average: 10.787 ms

tps = 92.706306 (including connections establishing)

tps = 93.830588 (excluding connections establishing)

[postgres@pgpool01 ~]$ psql -p 5432 -d test

psql (9.5.6)

Type "help" for help.

test=# select relname,n_tup_ins,n_tup_upd,n_tup_del  from pg_stat_user_tables;

     relname      | n_tup_ins | n_tup_upd | n_tup_del 

------------------+-----------+-----------+-----------

 pgbench_tellers  |         0 |       143 |         0

 pgbench_accounts |         0 |       143 |         0

 pgbench_history  |       143 |         0 |         0

 pgbench_branches |         0 |       143 |         0

 insert_lock      |         0 |         0 |         0

(5 rows)

[postgres@pgpool02 ~]$ psql -p 5433 -d test

psql (9.5.6)

Type "help" for help.

test=# select relname,n_tup_ins,n_tup_upd,n_tup_del  from pg_stat_user_tables;

     relname      | n_tup_ins | n_tup_upd | n_tup_del 

------------------+-----------+-----------+-----------

 pgbench_tellers  |         0 |         0 |         0

 pgbench_accounts |         0 |         0 |         0

 pgbench_history  |         0 |         0 |         0

 pgbench_branches |         0 |         0 |         0

 insert_lock      |         0 |         0 |         0

(5 rows)