What about memcached? Is it running on localhost or over the network?
Any chance you could get an strace from the memcached side? Have your test
app talk to a separate test instance or something.
Is it exactly or close to 0.10s each time? That's suspicious.
On Mon, 1 Mar 2010, Chaosty wrote:
> sorry my bad full strace is:
> 0.000085 [28b4f1ab] gettimeofday({1667458660, 1681273911}, NULL)
> = 0 <0.000013>
> 0.000202 [28b5f2a3] write(9, "set
> b5e03d478da6b7b8e61095fec4eb0"..., 8196) = 8196 <0.000038>
> 0.000091 [28b5f2a3] write(9, "pr.parent_id = p.parent_id
> (1)\";s"..., 1360) = 1360 <0.000023>
> 0.000078 [28b5f2c3] read(9, 0x2aef6054, 8196) = -1 EAGAIN
> (Resource temporarily unavailable) <0.000014>
> 0.000061 [28b09d6f] poll([{fd=574240058, events=POLLIN|POLLPRI|
> POLLRDNORM|POLLWRBAND|POLLERR|POLLNVAL|0x6000}], 1, INFTIM) = 1
> ([{fd=1933255265, revents=POLLIN|POLLPRI|POLLOUT|POLLHUP|POLLNVAL|
> 0x3a00}]) <0.098976>
> 0.099064 [28b5f2c3] read(9, "STORED\r\n"..., 8196) = 8 <0.000018>
> 0.000090 [28b4f1ab] gettimeofday({875772260, 912536929}, NULL) =
> 0 <0.000013>
>
>
> On Mar 1, 6:24 pm, Chaosty <chaostyz...@gmail.com> wrote:
> > And here is strace
> > ...
> > 0.000085 [28b4f1ab] gettimeofday({1667458660, 1681273911}, NULL)
> > = 0 <0.000013>
> > 0.000202 [28b5f2a3] write(9, "set
> > b5e03d478da6b7b8e61095fec4eb0"..., 8196) = 8196 <0.000038>
> > 0.000091 [28b5f2a3] write(9, "pr.parent_id = p.parent_id
> > (1)\";s"..., 1360) = 1360 <0.000023>
> > 0.000078 [28b5f2c3] read(9, 0x2aef6054, 8196) = -1 EAGAIN
> > (Resource temporarily unavailable) <0.000014>
> > 0.000061 [28b09d6f] poll([{fd=574240058, events=POLLIN|POLLPRI|
> > POLLRDNORM|POLLWRBAND|POLLERR|POLLNVAL|0x6000}], 1, INFTIM) = 1
> > ([{fd=1933255265, revent$
> > 0.099064 [28b5f2c3] read(9, "STORED\r\n"..., 8196) = 8 <0.000018>
> > 0.000090 [28b4f1ab] gettimeofday({875772260, 912536929}, NULL) =
> > 0 <0.000013>
> > ...
> >
> > by strace read took almost 0.10 seconds..
> >
> > On Mar 1, 6:13 pm, Chaosty <chaostyz...@gmail.com> wrote:
> >
> > > The tests were performed by modifying the set method like this:
> >
> > > public static function set($key, $item, $exp = 60) {
> > > $benchmark = Profiler::start ('Memory', 'Set: '. $key);
> > > $return = self::$instance->set ($key, $item, $exp);
> > > Profiler::stop ($benchmark);
> > > return $return;
> > > }
> >
> > > Then I figured out that almost each set is cost to us ~0.000079
> > > seconds
> > > but the big key costs ~0.099359 seconds
> >
> > > this is trace info with: truss -faedD -o /phplog
> > > ...
> > > 76982: 2.431621337 0.000014247 gettimeofday({1267456195.261569 },0x0)
> > > = 0 (0x0)
> > > 76982: 2.431709896 0.000014806 gettimeofday({1267456195.261658 },0x0)
> > > = 0 (0x0)
> > > 76982: 2.431964677 0.000045257 write(9,"set
> > > b5e03d478da6b7b8e61095fec4eb"...,8196) = 8196 (0x2004)
> > > 76982: 2.432037871 0.000017600 write(9,"pr.parent_id = p.parent_id
> > > (1)";"...,1360) = 1360 (0x550)
> > > 76982: 2.432097655 0.000015644 read(9,0x2aedb054,8196) ERR#35
> > > 'Resource temporarily unavailable'
> > > 76982: 2.532011750 0.099864927 poll({9/POLLIN},1,-1) = 1 (0x1)
> > > 76982: 2.532070696 0.000016482 read(9,"STORED\r\n",8196) = 8 (0x8)
> > > 76982: 2.532135509 0.000014248 gettimeofday({1267456195.362084 },0x0)
> > > = 0 (0x0)
> > > ...
> > > seems here's the problem: 76982: 2.532011750 0.099864927 poll({9/
> > > POLLIN},1,-1) = 1 (0x1)
> >
> > > On Feb 28, 3:41 am, dormando <dorma...@rydia.net> wrote:
> >
> > > > How are you performing the test? Is memcached over localhost or over the
> > > > network?
> >
> > > > If you can reproduce this in isolation I'd be curious to see what
> > > > memcached and/or php are waiting on that takes so long (via strace or
> > > > similar).
> >
> > > > On Wed, 24 Feb 2010, me from wrote:
> > > > > Adam we are on freebsd 7.2, as i said early we use PECL memcached
> > > > > 1.0.0 with libmemcached 0.35, the memcached version is 1.4.4.
> >
> > > > > We use our framework this is an init method
> >
> > > > > ????????? public static function instance() {
> > > > > ????????? ????????? if (self::$instance === NULL) {
> > > > > ????????? ????????? ????????? // Create a new instance
> > > > > ????????? ????????? ????????? self::$instance = new Memcached ();
> > > > > ????????? ????????? ????????? self::$instance->setOption
> > > > > (Memcached::OPT_DISTRIBUTION, Memcached::DISTRIBUTION_CONSISTENT);
> > > > > ????????? ????????? ????????? self::$instance->addServers (array
> > > > > (array ('127.0.0.1', 11211, 100)));
> > > > > ????????? ????????? }
> > > > > ????????? }
> >
> > > > > and this is a set method that works fine with small data and stops
> > > > > with data > 100kbs
> >
> > > > > ????????? public static function set($key, $item, $exp = 60) {
> > > > > ????????? ????????? return self::$instance->set ($key, $item, $exp);
> > > > > ????????? }
> >
> > > > > Marc, no we don't use persistent you can see it in our init method.
> >
> > > > > On Wed, Feb 24, 2010 at 8:47 PM, Marc Bollinger
> > > > > <mbollin...@gmail.com> wrote:
> > > > > And are you using persistent connections? There have been a
> > > > > handful of
> > > > > threads recently, discussing setting up persistent connections
> > > > > with
> > > > > PECL::memcached.
> >
> > > > > - Marc
> >
> > > > > On Wed, Feb 24, 2010 at 9:41 AM, Adam Lee <a...@fotolog.biz> wrote:
> > > > > > What kind of hardware and software configurations are you using on
> > > > > > the
> > > > > > client and server sides?
> > > > > > We have servers doing like 5M/s in and 10M/s out without even
> > > > > > breaking a
> > > > > > sweat...
> >
> > > > > > On Wed, Feb 24, 2010 at 7:35 AM, me from <chaostyz...@gmail.com>
> > > > > > wrote:
> >
> > > > > >> We use memcached php extension,
> > > > > >> (http://pecl.php.net/package/memcached)
> >
> > > > > >> On Wed, Feb 24, 2010 at 12:02 PM, Juri Bracchi <yak...@gmail.com>
> > > > > >> wrote:
> >
> > > > > >>> the latest memcache php extension version is 2.2.5
> >
> > > > > >>>http://pecl.php.net/package/memcache
> >
> > > > > >>> On Wed, 24 Feb 2010 05:09:36 +0300, me from wrote:
> > > > > >>> > No. Sorry for misunderstanding, its my bad. Its php extension
> > > > > >>> > (PECL)
> > > > > >>> > of version 1.0.0.
> >
> > > > > >>> > Memcached is 1.4.4
> >
> > > > > >>> > On Wed, Feb 24, 2010 at 4:42 AM, Eric Lambert
> > > > > >>> > <eric.d.lamb...@gmail.com> wrote:
> >
> > > > > >>> >>> PHP5.3, libmemcached 0.35, memcached 1.0.0
> >
> > > > > >>> >> Is this really the version of the memcached server you are
> > > > > >>> >> using
> > > > > >>> >> (1.0.0) If so, that is certainly out-of-date. Latest version is
> > > > > >>> >> 1.4.*.
> >
> > > > > >>> >> Eric
> >
> > > > > >>> >> Chaosty wrote:
> > > > > >>> >>> We have found that Memcahed::set stores items around
> > > > > >>> >>> 100-200kbs for
> > > > > >>> >>> 0.10-0.11 seconds, its too slow. Compression is turned off.
> > > > > >>> >>> Any
> > > > > >>> >>> suggestions?
> >
> > > > > >>> >>> PHP5.3, libmemcached 0.35, memcached 1.0.0
> >
> > > > > > --
> > > > > > awl
>
