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Re: Subversion trunk (r1078338) HTTP(/WC?) performance problems?

From: Philip Martin <philip.martin_at_wandisco.com>
Date: Wed, 09 Mar 2011 17:12:15 +0000

Joe Orton <jorton_at_redhat.com> writes:

> On Wed, Mar 09, 2011 at 08:50:37AM -0800, Justin Erenkrantz wrote:
>> On Wed, Mar 9, 2011 at 8:28 AM, Philip Martin
>> <philip.martin_at_wandisco.com> wrote:
>> >     0.000054 epoll_wait(3, {{EPOLLOUT, {u32=30583944, u64=30583944}}}, 16, 3600000000) = 1 <0.000011>
>>
>> As best as I can tell, that strace isn't matching your earlier
>> description. The last epoll_wait is taking 0.000011 seconds? --
>
> Smells like Nagle to me - looks like serf is turning Nagle *on* not
> off... ("nodelay off" == "delay on") - try this?
>
> Index: outgoing.c
> ===================================================================
> --- outgoing.c (revision 1440)
> +++ outgoing.c (working copy)
> @@ -201,7 +201,7 @@
>
> /* Disable Nagle's algorithm */
> if ((status = apr_socket_opt_set(skt,
> - APR_TCP_NODELAY, 0)) != APR_SUCCESS)
> + APR_TCP_NODELAY, 1)) != APR_SUCCESS)
> return status;
>
> /* Configured. Store it into the connection now. */

Yes, that's it. Serf is now comparable to neon.

-- 
Philip
Received on 2011-03-09 18:12:50 CET

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