Re: excessive swap-in time

pa@xxxxxxxxxxxxxxxxxxxxx (Pierre Asselin) writes:
phil-news-nospam@xxxxxxxx wrote:

[...]

If it means it will leave the process in
RAM, that may not work. The reason is that other processes have caused
this process to swap out, and appropriately so.

Maybe, maybe not. It could have been swapped out to make room for more
file cache, inappropriately so --or maybe even appropriately so, it's
pretty darn hard to guess these things correctly without measuring.

It is actually 'pretty darn easy': If there is ever signficant paging
activity, the system had too little physical RAM at this point in
time. If there is always significant paging activity, the system has
simply too little RAM for its usual workload. The solution is (to
repeat this again), to either add RAM until the regular paging
activity stops or to reduce the virtual memory usage. There is no
third option, except if counting 'complaining about problems one does
not want to fix' as an option.

.

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