Re: /proc reliability & performance

[dada1]

From: "David S. Miller" <davem@xxxxxxxxxx>
> "dada1" <dada1@xxxxxxxxxxxxx> wrote:
>
> > A "cat /proc/net/tcp" takes too much time to even try it. :(
> >
> > tools like "netstat" or "lsof", (even with -n flag) are just unusable.
>
> Because they don't use the netlink TCP socket dumping
> facility which is made to handle such things much better
> than procfs ever can.

Thanks David for the hint. :) I buy it.

I found that the ss command from iproute2 package does use the 'netlink TCP
dumping' you mention (how many people on earth heard about that ?)

Instead of 15 minutes for a 'netstat -n > FILE', my server takes now 6
seconds with 'ss -n > FILE', with 200000 sockets opened.

Eric

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