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IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
book

IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning

by Cathy Warrick, Craig Gordon, Benoit Granier, Keitaro Imai, Rosemary McCutchen, Brannen Proctor, Jim Sedgwick, Paulus Usong, Mary Ann Vandermark, John Wickes
December 2005
Intermediate to advanced content levelIntermediate to advanced
530 pages
18h 34m
English
IBM Redbooks
Content preview from IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
212 IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
When you are capturing data to a file, the nmon tool disconnects from the shell to ensure that it
continues running even if you log out. This means that nmon can appear to crash, but it is still
running in the background until the end of the analysis period.
7.4.3 filemon
The filemon command monitors a trace of file system and I/O system events, and reports
performance statistics for files, virtual memory segments, logical volumes, and physical
volumes. The filemon command is useful to those whose applications are believed to be
disk-bound, and want to know where and why.
The filemon command provides a quick test to determine if there is an I/O problem by
measuring the I/O ...
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ISBN: 0738494119Purchase book