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前面有提到和oracle相比#xff0c;达梦的归档日志相关参数有个比较特别#xff0c;可以通过设置它去规定归档日志的保留时间。 ARCH_RESERVE_TIME#xff1a;归档日志保留时间#xff0c;单位分钟#xff0c;取值范围 0~2147483647。只…达梦的参数ARCH_RESERVE_TIME测试
前面有提到和oracle相比达梦的归档日志相关参数有个比较特别可以通过设置它去规定归档日志的保留时间。 ARCH_RESERVE_TIME归档日志保留时间单位分钟取值范围 0~2147483647。只对本地归档有效。服务器每隔 5 分钟检查是否存在超过保留时间的归档并删除。缺省为 0表示不删除归档。
基础环境
OS版本
Red Hat Enterprise Linux Server release 7.9 (Maipo)
DB版本
DM Database Server 64 V8
DB Version: 0x7000c
03134284132-20240115-215128-200811 测试环境准备
当前数据库已经开启归档模式归档路径为/dm8/arch该路径下已经有照相日志生成。
[dmdbatest arch]$ disql sysdba/Dameng123服务器[LOCALHOST:5236]:处于普通打开状态
登录使用时间 : 3.452(ms)
disql V8
SQL select name,status$,arch_mode from v$database;行号 NAME STATUS$ ARCH_MODE
---------- ------ ----------- ---------
1 DAMENG 4 Y已用时间: 0.222(毫秒). 执行号:1401.
SQL select ARCH_NAME,ARCH_TYPE,ARCH_DEST,ARCH_FILE_SIZE,ARCH_RESERVE_TIME from v$dm_arch_ini;行号 ARCH_NAME ARCH_TYPE ARCH_DEST ARCH_FILE_SIZE ARCH_RESERVE_TIME
---------- -------------- --------- --------- -------------- -----------------
1 ARCHIVE_LOCAL1 LOCAL /dm8/arch 64 0已用时间: 0.221(毫秒). 执行号:1402.[dmdbatest arch]$ pwd
/dm8/arch
[dmdbatest arch]$ ll
total 65552
-rw-r--r-- 1 dmdba dinstall 16384 Apr 8 19:42 ARCHIVE_LOCAL1_0x59BEDBAC_EP0_2024-04-08_19-41-20.log
-rw-r--r-- 1 dmdba dinstall 67108864 Apr 8 19:45 ARCHIVE_LOCAL1_0x59BEDBAC_EP0_2024-04-08_19-43-15.log2 设置参数ARCH_RESERVE_TIME
修改dmarch.ini配置文件添加ARCH_RESERVE_TIME 5并重启数据库。
--修改配置文件
vi dmarch.ini
[ARCHIVE_LOCAL1]ARCH_TYPE LOCALARCH_DEST /dm8/archARCH_FILE_SIZE 64ARCH_SPACE_LIMIT 0ARCH_FLUSH_BUF_SIZE 0ARCH_HANG_FLAG 1ARCH_RESERVE_TIME 5--重启数据库
[dmdbatest arch]$ DmServiceDMSERVER restart
Stopping DmServiceDMSERVER: [ OK ]
Starting DmServiceDMSERVER: [ OK ]
[dmdbatest arch]$ disql sysdba/Dameng123 服务器[LOCALHOST:5236]:处于普通打开状态
登录使用时间 : 5.708(ms)
disql V8
SQL select ARCH_NAME,ARCH_RESERVE_TIME from v$dm_arch_ini;行号 ARCH_NAME ARCH_RESERVE_TIME
---------- -------------- -----------------
1 ARCHIVE_LOCAL1 5已用时间: 1.386(毫秒). 执行号:501.观察归档日志发现归档日志已正常被清理。 查看数据库日志日志中也有相关提示“archive files exceeded the time limit 5 minutes begin removing”说明该参数是生效的。
2024-04-08 20:00:40.650 [INFO] database P0000022360 T0000000000000022398 archive files exceeded the time limit 5 minutes begin removing......
2024-04-08 20:00:40.650 [INFO] database P0000022360 T0000000000000022398 local archive delete before time [2024-04-08 19:55:40] start......
2024-04-08 20:00:40.650 [INFO] database P0000022360 T0000000000000022398 rafil_file_delete_low delete file[/dm8/arch/ARCHIVE_LOCAL1_0x59BEDBAC_EP0_2024-04-08_19-43-15.log]
2024-04-08 20:00:40.650 [INFO] database P0000022360 T0000000000000022398 delete local archive file[/dm8/arch/ARCHIVE_LOCAL1_0x59BEDBAC_EP0_2024-04-08_19-43-15.log].
2024-04-08 20:00:40.650 [INFO] database P0000022360 T0000000000000022398 rafil_file_delete_low delete file[/dm8/arch/ARCHIVE_LOCAL1_0x59BEDBAC_EP0_2024-04-08_19-41-20.log]
2024-04-08 20:00:40.650 [INFO] database P0000022360 T0000000000000022398 delete local archive file[/dm8/arch/ARCHIVE_LOCAL1_0x59BEDBAC_EP0_2024-04-08_19-41-20.log].
2024-04-08 20:00:40.650 [INFO] database P0000022360 T0000000000000022398 local archive delete before time [2024-04-08 19:55:40] end.
2024-04-08 20:00:40.650 [INFO] database P0000022360 T0000000000000022398 remote archive delete before time [2024-04-08 19:55:40] start......
2024-04-08 20:00:40.650 [INFO] database P0000022360 T0000000000000022398 remote archive delete before time [2024-04-08 19:55:40] end.
2024-04-08 20:00:40.650 [INFO] database P0000022360 T0000000000000022398 archive files exceeded the time limit 5 minutes removed, total files 2......
2024-04-08 20:01:40.718 [INFO] database P0000022360 T0000000000000022417 checkpoint requested by CKPT_INTERVAL, rlog free space[536846336], used space[16384]
2024-04-08 20:01:40.718 [INFO] database P0000022360 T0000000000000022417 checkpoint generate by ckpt_interval总结
通过ARCH_RESERVE_TIME参数我们可以在配置归档时顺便配置其其保留的时间不再需要额外配置脚本去清理归档日志。
谨记心存敬畏行有所止。
