2010/9/9 Martin Pelikan <[email protected]>:

Hello Martin,

> I thought the same when I played with TCP buffers set to 1M and after
> some heavy load tests I went out of RAM quite soon :-) The machine had
> 2G.

Well, the machine has 6Gb of RAM and is only pushing 10Mbit/s of
traffic at peak. It does need to maintain a largeish state table, as
it is predominatly web traffic, but I've run much much larger and
busier sites behind much smaller hardware with the same configs
before.

> I assume ping doesn't work either. Have you raised the recv/send
> space? Have you tried entering ddb? (you need to set the sysctl before
> start)

No, both machines don't ping and they completely hardlock. I can only
think it is an issue with pfsync, which causes both to lock up at the
same time, but that is a guess.

I guess I'll just upgrade them to 4.7 speculatively and hope it
doesn't happen again.

recv/send:
net.inet.tcp.recvspace=16384
net.inet.udp.recvspace=41600
j...@f1:/home/joe> sysctl -a |grep send
net.inet.tcp.sendspace=16384
net.inet.udp.sendspace=9216


Too low? What is a good value for them?

Thanks for your assistance.

 -- joe.

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