开启归档
- 创建归档目录
postgres@zjarn2021-Qh:~$ mkdir 14_bak
mkdir: cannot create directory ‘14_bak’: File exists
postgres@zjarn2021-Qh:~$ pwd
/var/lib/postgresql
- postgresql.conf相关参数
cat /etc/postgresql/14/main/postgresql.conf
archive_mode = 'ON'
archive_command = 'cp %p /var/lib/postgresql/14_bak/archive%f'
wal_level=replica
archive_timeout='900s'
wal_keep_size=128
max_wal_senders=10
- 重启数据库
/usr/lib/postgresql/14/bin/pg_ctl -D /var/lib/postgresql/14/main restart
- 查看归档模式是否开启
模拟业务写入
创建表
#创建表
create table tmpbm (id int,f1 text,f2 text) ;
创建脚本
postgres@zjarn2021-Qh:~$ cat insert.sql
\set id random(1, 1000000)
insert into tmpbm values(:id,repeat('testa',20),repeat('name',10)) ;
开始写入
pgbench -c 40 -j 1 -n -M prepared -T 60 -r -f insert.sql
切换日志
postgres=# select pg_switch_wal();
pg_switch_wal
---------------
0/E0000F0
(1 row)
postgres=# select pg_switch_wal();
pg_switch_wal
---------------
0/F000078
(1 row)
查看归档
postgres=# \x
Expanded display is on.
postgres=# SELECT * FROM pg_stat_archiver;
-[ RECORD 1 ]------+------------------------------
archived_count | 4
last_archived_wal | 000000010000000000000007
last_archived_time | 2022-01-24 23:50:10.447931+08
failed_count | 0
last_failed_wal |
last_failed_time |
stats_reset | 2022-01-24 00:56:12.460452+08
