1. 解释"log file switch (checkpoint incomplete)"的含义 "log file switch (checkpoint incomplete)" 是在使用Oracle数据库时可能遇到的一种错误消息。这个错误通常指示数据库在尝试切换日志文件(redo log file)时,由于某些原因,当前的检查点(checkpoint)未能及时完成。检查点是Oracle数据库用来确保数据从内存(如SGA...
8.针对log file switch checkpoint incomplete等待事件,根据官方文档资料,建议增加当前redo log file大小。 9.调整redo log从500M到2G。
log file switch (checkpoint incomplete) 10 3034.8 303479 47.8 Configuration DB CPU 5.5 .1 log file sync 28 2.3 82 .0 Commit log buffer space 24 .8 32 .0 Configuration 通过ASH不难发现 buffer busy waits 被 log file switch (checkpoint incomplete) 阻塞,而 log file switch (checkpoint incomple...
可以看出log file switch checkpoint incomplete等待事件占比也较高，平均等待时间较长。查看v$log视图，...
如果系统中出现大量的log file switch(checkpoint incomplete)等待事件,原因可能是日志文件太小或者日志组太少,DBWR写出速度太慢或者I/O存在问题,所以解决的方法是,考虑增加额外的DBWR或者增加日志文件的大小或者增加日志组的数量。 同时警告日志文件中会记录如下信息: ...
一:log file switch说明 二:log file switch官方文档 一:log file switch说明 select event#, name, wait_class from v$event_name where name like 'log file switch%' order by 1; log file switch (archiving needed) log file switch (checkpoint incomplete) ...
接手了一个新交接的库,alert日志频繁报告log file switch (checkpoint incomplete)事件 oracle文档解释: Waitingfora logswitchbecause the session cannot wrap into the next log. Wrapping cannot be performed because the checkpointforthat log has not completed. ...
log file switch (checkpoint incomplete)103034.830347947.8Configuration DB CPU5.5.1 log file sync282.382.0Commit log buffer space24.832.0Configuration 通过ASH不难发现buffer busy waits被log file switch (checkpoint incomplete)阻塞,而log file switch (checkpoint incomplete)又被LGWR的control file sequential rea...
log file switch (archiving needed)log file switch (checkpoint incomplete)其中log file switch (archiving needed)这个等待事件出现时通常是因为日志组循环写满以后，第一个日志归档尚未完成，出现该等待。出现该等待，可能表示io 存在问题。解决办法:可以考虑增大日志文件和增加日志组 移动归档文件到快速...
log file switch (checkpoint incomplete) - 容易被误诊的event 2019-12-10 12:54 − 本文转自 https://blogs.oracle.com/database4cn/log-file-switch-checkpoint-incomplete-%e5%ae%b9%e6%98%93%e8%a2%ab%e8%af%af%e8%af%8a%e7%9a%84event ... ZYLONG-SYS 0 3104 redo log 2019-12-19...