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By: Borland Staff
Abstract: Slowness might be due to the system swapping
The customer complains that performance is slow and that disk access is excessive.
Run the 3 following commands :
sar -u 2 10
verify that the WIO value is greater that 30. If it is not, the customer is not suffering from excessive disk access (generally < 30% is acceptable).
verify that the system is not swapping by checking the pages on swap category.
If this number is a high value, swapping is probably occuring. If swapping is occuring,
it is advisable to add more RAM to your computer.
sar -b 2 10
check %rcache %wcache
If the %rcache is less than 90% or the %wcache is less than 60% the preformance can probably
be improved significantly by tuning the SCO Unix kernel parameter NBUF to a larger value.
See the SCO help documentation for more information on Performance Tuning.
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