[patch] sysctls for TCP timers

[Andrey Zonov]

On 9/20/12 11:35 AM, Eggert, Lars wrote:
> Hi,
> 
> On Sep 20, 2012, at 9:25, Andrey Zonov <zont at freebsd.org> wrote:
>> Some of them may be read google's article about tuning TCP parameters
>> [1].  I convert most of TCP timers to sysctls [2] and we are using this
>> patch for few months.  We tuned net.inet.tcp.rtobase and
>> net.inet.tcp.syncache.rexmttime and it gives good results (especially in
>> conjunction with cc_htcp(4)).
> 
> can you share some measurements that quantify the results?
> 

When we set net.inet.tcp.syncache.rexmttime=200 and
net.inet.tcp.syncache.rexmtlimit=7 for our external web service, the
number of duplicated SYN was reduced in four times.

-- 
Andrey Zonov

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