I would say that with that much traffic first thing you don't want to do
is cache anything to the disk. Get a couple of gigabytes of memory, use
as few ACLs as possible, cache dns for squid on the same machine, but
don't use it as dns server for others, setup a logging server or disable
logging, disable everything the requires extra processing.
On Sun, 23 Mar 2003, L. Jankok wrote:
> Hi folks,
>
> Having to migrate a proxy server from a ultra sparc (u10) to
> FreeBSD I am looking for the appropriate kernel tuneables.
> The new system will run FreeBSD 4.7 Stable on a SMP machine
> with two very fast scsi disks and 1 1/2 GB of RAM.
>
> I did a man tuning, read the relevant sections on the freebsd handbook
> searched google and looked at the faq at www.squid-cache.org.
>
> This is what I have so far;
>
> kern.maxfiles:== 65536
> kern.maxfilesperproc: == 32768
> kern.ipc.somaxconn: == 8192
> kern.ipc.nmbclusters: == 131072
> net.inet.ip.portrange.last: == 3
> net.inet.tcp.sendspace: == 65535
> net.inet.tcp.recvspace: == 65535
> net.inet.tcp.delayed_ack: == 0
> net.inet.udp.maxdgram:== 57344
> net.inet.udp.recvspace: == 65535
> kern.ipc.shm_use_phys:== 1
> vfs.write_behind: == shouldn't this be turned off for web cache
> systems ?
> kern.ipc.shm_use_phys:== ok overhead>
> vfs.vmiodirenable:== ok as you can>
>
> For diskd the FAQ on www.squid-cache.org is clear about the kernel tuneables.
> It is the above settings which I want to know more about.
>
>
> My question to the list is as follows;
>
> Are there any kernel tuneables paramater above which are set wrong or which are plain
> irrelevant for a high performance http proxy server on FreeBSD ? and are there any
> relevant
> parameters (besides that for diskd) which are not included in the above list ?
> The system will be a dedicated http proxy server processing approximately 236 GB a
> month
> and like 216426 request per hour.
>
>
> tnx,
>
> Lucio Jankok
>
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