Re: git: kernel - vm - Change inactive target to 1/4 memory inst
Johannes Hofmann <johannes.hofmann@gmx.de> wrote:
> Matthew Dillon <dillon@apollo.backplane.com> wrote:
>> :On my troublesome 2GB machine, the inactive memory is now ~= 750M, which
>> :is about 1/3 of RAM, quite far from the 1/4 target.
>> :
>> :--
>> :Francois Tigeot
>>
>> It's just a target for the pageout daemon, it isn't something the
>> machine tries to hold itself to.
>>
>> Guys... everyone. Please don't try to interpret the values for
>> the active & inactive queues. Even a good chunk of the analysis of
>> the swap space use is wrong. There's absolutely nothing wrong with
>> the machine paging stuff out to swap. The issue is only whether it
>> does so to the degree that later pageins effect performance.
>>
>> Avalon, for example, usually has 200-400MB of idle data swapped out
>> which it basically never touches. It doesn't effect avalon's
>> performance.
>
> One point is probabely whether swap is on a disk with otherwise high
> IO rate. On my single disk system it is clearly a performance problem
> if program data is paged out due to filesystem activity because then
> the paging in is very slow.
>
> I can trigger this situation with
> hammer cleanup
> but also with
> find / -type f | xargs md5
This got fixed with 69adbed48cd5565446e8013fcc5131405a9e7c05
Cheers,
Johannes
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