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Message #00005
[Bug 376896] Re: Excessive swapping during hash
Nope. Swaps like hell
BTW, I've found some discussion on linux-mm, which could be related to this case: http://marc.info/?l=linux-kernel&m=121616312201185&w=2
Also mysql guys had similar problems with mmaps: http://bugs.mysql.com/bug.php?id=37408
** Bug watch added: MySQL Bug System #37408
http://bugs.mysql.com/bug.php?id=37408
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Excessive swapping during hash
https://bugs.launchpad.net/bugs/376896
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Status in Linux DC++: New
Bug description:
There is a reproducable problem in linuxdcpp (or maybe it is the kernel/libc?), where hashing a large file causes excessive swapping to occur, while memory usage is far from 100%. I've seen this on at least two different machines, both working under gentoo amd64 and both using 2.6.29.2 kernel.
Steps to reproduce:
1. Start X/GNOME/KDE, some programs in the background to give system something to swap
2. Start hashing some _big_ files (say, 2GIG and more on a system with 4GiGs of RAM)
3. See swapping to occur
I don't know whether thisi is a kernel or stdlib or linuxdcpp issue, but I only see such swapping with linuxdcpp
Here is a "vmstat 2" output during hashing of two big files in the attachment