Messages in this thread | | | Date | Wed, 16 Sep 1998 09:42:27 -0700 (PDT) | From | Simon Kirby <> | Subject | Re: Very bad swap bug -- 2.0, 2.1 at least |
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On Wed, 16 Sep 1998, Kurt Garloff wrote: > On Tue, Sep 15, 1998 at 09:32:30PM -0700, Simon Kirby wrote: > > > >From the tests I did before, it seems what is being "swapped in" is the > > executable code of a program which has been previously swapped out. I had > > a program running that sleep()ed for a few seconds and then ran a small > > main loop (stat()ed a file) -- every time the main loop ran, vmstat would > > show the swap in ("si") number as non-zero. I confirmed this by stracing > > the program and running "vmstat 1" at the same time. > > > > Issuing a "swapoff -a ; swapon -a" causes the program to go away, until > > something else forces some programs out to swap. (In this case, it seems > > to be some customer's run-away CGI script). > > If swapoff -a; swapon -a kills your program, you're out of physicak memory. > Then your swapspace is needed and the swapin is just what you should expect. > Or did I miss anything?
It doesn't kill my program, it makes the problem go away, as it flushes out the swap.
Simon-
| Simon Kirby | Systems Administration | | mailto:sim@netnation.com | NetNation Communications | | http://www.netnation.com/ | Tech: (604) 684-6892 |
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