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DB2如何查看日志使用空间

Jun 07, 2016 pm 05:33 PM
data

在日常DB2的维护中,transaction log full是比较常见的问题,日志空间使用情况也是我们比较重视的问题,那么如何查看日志空间使用

在日常DB2的维护中,transaction log full是比较常见的问题,日志空间使用情况也是我们比较重视的问题,那么如何查看日志空间使用情况呢?
其实昨天在提到归档设置,我们知道DB2 在DATABASE级别有几个参数,如下决定了事物日志的使用空间大小
Log file size (4KB)                        (LOGFILSIZ) = 60000
Number of primary log files                (LOGPRIMARY) = 16
Number of secondary log files              (LOGSECOND) = 200
Changed path to log files                  (NEWLOGPATH) =
Path to log files                                      = /db2inst1_log01/sample
如此我们可以计算分配给日志的空间大约是(200+16)*60000*4/1024/1024大约50GB。
如果日志是单独的文件系统分区,我们在操作系统上即可看到日志空间使用情况,对日志使用情况进行监控,可以看到如下信息:

$ df -g
Filesystem          GB blocks      Free  %Used    Iused  %Iused  Mounted on
/dev/db2inst1_log01    60.00    54.50  10%    1458    1%      /db2inst1_log01
这个需要登录到系统,其实db2pd也是可以看到日志信息的
db2pd -d sample -logs

Database Partition 0 -- Database SAMPLE -- Active -- Up 34 days 17:30:12 -- Date 2013-11-26-10.42.49.558342

Logs:
Current Log Number            117123   
Pages Written                33697   
Cur Commit Disk Log Reads    0                 
Cur Commit Total Log Reads    0                 
Method 1 Archive Status      Success
Method 1 Next Log to Archive  117123   
Method 1 First Failure        n/a
Method 2 Archive Status      n/a
Method 2 Next Log to Archive  n/a
Method 2 First Failure        n/a
Log Chain ID                  2       
Current LSN                  0x00001A2DDE649E70

Address            StartLSN        State      Size      Pages      Filename
0x0700000177B795D0 00001A2CBFD88010 0x00000000 60000      60000      S0117104.LOG
0x0700000177B806D0 00001A2CCE7E8010 0x00000000 60000      60000      S0117105.LOG
0x0700000177B8B450 00001A2CDD248010 0x00000000 60000      60000      S0117106.LOG
0x0700000177B82EF0 00001A2CEBCA8010 0x00000000 60000      60000      S0117107.LOG
0x0700000177B9ECD0 00001A2CFA708010 0x00000000 60000      60000      S0117108.LOG
0x0700000177BA27D0 00001A2D09168010 0x00000000 60000      60000      S0117109.LOG
0x0700000177B79E30 00001A2D17BC8010 0x00000000 60000      60000      S0117110.LOG
0x0700000177BAAD50 00001A2D26628010 0x00000000 60000      60000      S0117111.LOG
0x0700000177B9FFD0 00001A2D35088010 0x00000000 60000      60000      S0117112.LOG
0x0700000177BB44D0 00001A2D43AE8010 0x00000000 60000      60000      S0117113.LOG
0x0700000177BD45D0 00001A2D52548010 0x00000000 60000      60000      S0117114.LOG
0x0700000177B7F0D0 00001A2D60FA8010 0x00000000 60000      60000      S0117115.LOG
0x0700000177B9C850 00001A2D6FA08010 0x00000000 60000      60000      S0117116.LOG
0x0700000177B84750 00001A2D7E468010 0x00000000 60000      60000      S0117117.LOG
0x0700000177B877D0 00001A2D8CEC8010 0x00000000 60000      60000      S0117118.LOG
0x0700000177B857D0 00001A2D9B928010 0x00000000 60000      60000      S0117119.LOG
0x0700000177B7DC50 00001A2DAA388010 0x00000000 60000      60000      S0117120.LOG
0x0700000177B83750 00001A2DB8DE8010 0x00000000 60000      60000      S0117121.LOG
0x0700000177B907B0 00001A2DC7848010 0x00000000 60000      60000      S0117122.LOG
0x0700000177B91010 00001A2DD62A8010 0x00000000 60000      60000      S0117123.LOG
0x0700000177B9A150 00001A2DE4D08010 0x00000000 60000      60000      S0117124.LOG
不过之只能看到当前使用日志和日志文件对应的LSN信息和归档情况,对于使用率还真不能看到。
另外还可以在实例快照中看到,不过在此不示例了。

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