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

From: Joe Orton <jorton_at_redhat.com>
Date: Wed, 9 Mar 2011 17:06:47 +0000

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. */
Received on 2011-03-09 18:07:21 CET

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