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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
266 IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
If this sequence of events is widespread, it is known as thrashing and is normally indicative of
insufficient RAM for the present workload. Thrashing is extremely detrimental to system
performance, as the CPU and I/O loads that can be generated in such a situation can quickly
outweigh the load imposed by system's real work. In extreme cases, the system may actually
do no useful work, spending all its resources on moving pages to and from memory.
8.2.3 Understanding and tuning the daemons
A daemon is comparable to a service in Windows 2000. Daemons provide different services. ...
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Publisher Resources

ISBN: 0738494119Purchase book