One of our instances encountered several periods of slowness yesterday and
during my investigation one thing discovered that the one having the
problems wasn't using any of the swap assigned to it. Below is the output
of cat /proc/meminfo, first on the slow instance then on another instance
that is running fine. Both are SLES7 on z/VM
wsapp41p:/var/log # cat /proc/meminfo
total: used: free: shared: buffers: cached:
Mem: 787607552 746356736 41250816 0 117907456 230809600
Swap: 2147467264 0 2147467264
MemTotal: 769148 kB
MemFree: 40284 kB
MemShared: 0 kB
Buffers: 115144 kB
Cached: 225400 kB
SwapCached: 0 kB
Active: 52780 kB
Inact_dirty: 287764 kB
Inact_clean: 0 kB
Inact_target: 0 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 769148 kB
LowFree: 40284 kB
SwapTotal: 2097136 kB
SwapFree: 2097136 kB
wsapp42p:~ # cat /proc/meminfo
total: used: free: shared: buffers: cached:
Mem: 787607552 756047872 31559680 0 12533760 338657280
Swap: 2147467264 2162688 2145304576
MemTotal: 769148 kB
MemFree: 30820 kB
MemShared: 0 kB
Buffers: 12240 kB
Cached: 328608 kB
SwapCached: 2112 kB
Active: 30820 kB
Inact_dirty: 311384 kB
Inact_clean: 756 kB
Inact_target: 16 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 769148 kB
LowFree: 30820 kB
SwapTotal: 2097136 kB
SwapFree: 2095024 kB
Josh Konkol, CCSA CNE MCSE
Technical Research Specialist
.~. GuideOne Insurance
/V\
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