November 2003
Intermediate to advanced
212 pages
6h 37m
English
book
S/390 PartnerWorld for Developers, ITSO/EFS Project EFS Systems on a Linux Base: Additional Topics
by Bill Ogden, Michael Ryan
Content preview from S/390 PartnerWorld for Developers, ITSO/EFS Project EFS Systems on a Linux Base: Additional Topics
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20 EFS Systems on a Linux Base: Additional Topics
The key message is that you should adjust your FLEX-ES system parameters (emulated
S/390 memory, disk caches, instruction cache) to avoid Linux swapping. Defining a smaller
emulated S/390 memory size may increase z/OS paging. Of course, it would be nice to avoid
any paging, but z/OS paging is much less damaging than Linux swapping and your trade-offs
should always be in this direction. You can juggle disk cache versus instruction cache versus
S/390 memory allocations for your best performance. Simply be careful not to push Linux into
swapping.
14
2.3 Other monitoring tools
There are many Linux moni ...
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