Messages in this thread | | | Date | Tue, 9 Sep 2003 14:25:47 +0200 | From | Andrea Arcangeli <> | Subject | Re: experiences beyond 4 GB RAM with 2.4.22 |
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On Tue, Sep 09, 2003 at 11:01:12AM +0200, Stephan von Krawczynski wrote: > Hello, > > lately I upgraded my testbox from 2 to 6 GB ram and found out some oddities I > would like to hear your opinions. > The box ran flawlessly and performant with 2 GB - was in fact a real joy. > After upgrading the ram and recompiling kernel 2.4.22 with support for 64 GB I > noticed: > > 1) nfs clients see timeouts again, like > > Sep 9 03:37:35 clienta kernel: nfs: server 192.168.1.1 not responding, still > trying > Sep 9 03:37:35 clienta kernel: nfs: server 192.168.1.1 OK > Sep 9 03:37:35 clienta kernel: nfs: server 192.168.1.1 not responding, still > trying > Sep 9 03:37:35 clienta kernel: nfs: server 192.168.1.1 OK > Sep 9 03:41:13 clienta kernel: nfs: server 192.168.1.1 not responding, still > trying > Sep 9 03:41:13 clienta kernel: nfs: server 192.168.1.1 OK > > Both are 2.4.22. 192.168.1.1 is the testbox. I saw those with 2GB, but could > fix it through more nfs-daemons and > > echo 2097152 >/proc/sys/net/core/rmem_max > echo 2097152 >/proc/sys/net/core/wmem_max > > Are these values too small for 6 GB? > > 2) Box is very slow, kswapd looks very active during tar of a local harddisk. > Interactivity is really bad. Seems vm has a high time looking for free or > usable pages. Compared to 2 GB the behaviour is unbelievably bad. > > 3) Network performance has a remarkable dropdown during above tar. In fact > doing simple pings every few minutes shows that quite a lot of them are simply > dropped, never make it over the ethernet. > > I am really astonished about this. Can some kind soul give me hints or maybe > patches to try?
for the vm issues my suggestion is to try again with 2.4.22aa1.
Andrea
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