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From Devraj Mukherjee <dev...@gmail.com>
Subject Re: [users@httpd] mod_ssl, erratic performance
Date Sat, 22 Jan 2011 22:56:58 GMT
I found that turning KeepAlive On makes a huge difference to SSL
performance (or performance in general).

On Sat, Jan 22, 2011 at 11:53 AM,  <john.3.newton@bt.com> wrote:
> Solaris 10
> Apache version: 2.2.11 & 2.2.17 (32 &64 bit)
>
> We recently moved our production webserver from a sparc platform (T2000) to an x86/64
platform (x2270-m2) and we have noticed an erratic response time for downloads of files using
SSL. This seems to randomly occur with any files about 10k or larger. For instance, I have
been using a test file of 140K, and it can take 0.5 or 4.8 seconds to transfer. When using
the sparc platform, it always only takes 0.5 seconds.
>
> I noticed this as we are using an external monitoring system (Gomez.com) and we started
seeing these wildly varying times for transaction processing.
>
> I have tried a cut down SSL setup for testing, and examined every directive and option,
and I can't make sense of the problem. I'm using the following configuration string, and I'd
be happy to include the configuration setups..
>
> ./configure --prefix=/app/www/apache-2.2.11_32 --with-mpm=worker --enable-ssl --with-apr=/app/apr-1.3.3-32
--with-apr-util=/app/apr-1.3.3-32 --enable-mods-shared="headers expires deflate"
>
> Server version: Apache/2.2.17 (Unix)
> Server built:   Jan  5 2011 15:56:01
> Server's Module Magic Number: 20051115:25
> Server loaded:  APR 1.3.3, APR-Util 1.3.4
> Compiled using: APR 1.3.3, APR-Util 1.3.4
> Architecture:   32-bit
> Server MPM:     Worker
>  threaded:     yes (fixed thread count)
>    forked:     yes (variable process count)
> Server compiled with....
>  -D APACHE_MPM_DIR="server/mpm/worker"
>  -D APR_HAS_SENDFILE
>  -D APR_HAS_MMAP
>  -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
>  -D APR_USE_FCNTL_SERIALIZE
>  -D APR_USE_PTHREAD_SERIALIZE
>  -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
>  -D APR_HAS_OTHER_CHILD
>  -D AP_HAVE_RELIABLE_PIPED_LOGS
>  -D DYNAMIC_MODULE_LIMIT=128
>  -D HTTPD_ROOT="/app/www/apache-2.2.17_32"
>  -D SUEXEC_BIN="/app/www/apache-2.2.17_32/bin/suexec"
>  -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
>  -D DEFAULT_ERRORLOG="logs/error_log"
>  -D AP_TYPES_CONFIG_FILE="conf/mime.types"
>  -D SERVER_CONFIG_FILE="conf/httpd.conf"
>
> I can move the bare-bones configuration between the sparc and x86 platforms and get normal
response on the sparc, and irregular on the x86.
>
> Any help would be appreciated.
>
> John Newton
>
>
>
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