可以監控指定進程的文件IO操作：pt-ioprofile
pt-ioprofile，可以監控指定進程的文件IO操作，統計出讀寫文件的次數、大小和耗時。當使用iotop發現某進程有超出預期的大量IO操作，可以用這個腳本定位具體訪問的文件。
Usage
pt-ioprofile [OPTIONS] [FILE]
pt-ioprofile does two things: 1) get lsof+strace for -s seconds, 2) aggregate the result. If you specify a FILE, then step 1) is not performed.
RISKS
WARNING: pt-ioprofile freezes the server and may crash the process, or make it perform badly after detaching, or leave it in a sleeping state! Before using this tool, please:
- Read the tool’s documentation
- Review the tool’s known “BUGS”
- Test the tool on a non-production server
- Backup your production server and verify the backups
pt-ioprofile should be considered an intrusive tool, and should not be used on production servers unless you understand and accept the risks.
DESCRIPTION
pt-ioprofile usesstraceandlsofto watch a process’s IO and print out a table of files and I/O activity. By default, it watches the mysqld process for 30 seconds. The output is like:
Tue Dec 27 15:33:57 PST 2011
Tracing process ID 1833
total read write lseek ftruncate filename
0.000150 0.000029 0.000068 0.000038 0.000015 /tmp/ibBE5opS 本文由用戶 y37f 自行上傳分享，僅供網友學習交流。所有權歸原作者，若您的權利被侵害，請聯系管理員。
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