Re: Failed reading line from stream (0): over 1'000'000 pages on google and no fix?
http://code.google.com/p/memcached/wiki/Timeouts <-- run through this.
You can also try to get the key in question from your error, then fetch
the key manually and inspect it to see if the data is corrupt.
On Tue, 28 Jun 2011, kfa1983 wrote:
> Yea, I think the server is timing out but WHY? xD the port is open.
> But the problem is actually the memcache or the code? Thanks!
>
> On 28 juin, 19:26, dormando wrote:
> > > In the logs:
> > > Notice: Memcache::get() [memcache.get]:
> > > Server localhost (tcp 11211) failed with: Failed reading line from
> > > stream (0) in /var/www/html/inc/chat/libraries/server/NodeJS.php > > b> on line 37
> > > {"r":"registered"}
> >
> > > At line 37:
> > > $session = json_decode($this->memcache->get('session/' . $cookie-
> > > >sid));
> >
> > I hate that client...
> >
> > That's either a timeout, or a corrupt key?
>
Re: Failed reading line from stream (0): over 1'000'000 pages on google and no fix?
Yea, I think the server is timing out but WHY? xD the port is open.
But the problem is actually the memcache or the code? Thanks!
On 28 juin, 19:26, dormando wrote:
> > In the logs:
> > Notice: Memcache::get() [memcache.get]:
> > Server localhost (tcp 11211) failed with: Failed reading line from
> > stream (0) in /var/www/html/inc/chat/libraries/server/NodeJS.php > b> on line 37
> > {"r":"registered"}
>
> > At line 37:
> > $session = json_decode($this->memcache->get('session/' . $cookie-
> > >sid));
>
> I hate that client...
>
> That's either a timeout, or a corrupt key?
Invitation to connect on LinkedIn
LinkedIn I'd like to add you to my professional network on LinkedIn. - Peter Peter Pang senior software engineer at Baidu, Inc. Melbourne Area, Australia Confirm that you know Peter Pang https://www.linkedin.com/e/-8vvkjb-gphs0amk-2s/isd/3375612604/0rGRLJBa/ -- (c) 2011, LinkedIn Corporation
Memcached "get_or_lock" and defer "delete" functions Proposal
Memcached "get_or_lock" and defer "delete" functions Proposal
ABSTRACT
On busiest web sites who depend on memcache technology, when cache
expired or deleted, they should face database query flood. This is the
Concurrent-Cache-Miss-Renew problem. This proposal provide a Defer-
Expiration mechanism to solve the problem.
This proposal also recall the defer "delete" function back to solve
frequent delete problem.
MOTIVATION
--
On our web site, always we use following piece code to acting with
memcache:
$val = $memcache->get($key);
if (!$val) {
$val = $db->query($sql);
$memcache->set($key, $val, $expire);
}
If $sql is large time consumed, then when cache expired on high visits
period, we should face database load too high problem.
Why? Because $sql is complicate, then the database query should need a
bit long time. Before the database query complete, there should be a
lot of concurrent requests got cache-miss and do same cache-renew
process. Too many concurrent and complicate $sql query should slow-
down the database execution and let more requests fall in cache-miss
and cache-renew hell. This is a positive feedback until the cache be
renewed lastly.
In our practice, this problem led our site unstable on high visits
period randomly. And, when it happens, always need several seconds to
get back stable.
About defer `delete` function, when we frequent update database and
delete cache entry (e.g., delete entry 20 times in 1 second), we will
got lots cache-miss and enhanced the above (Concurrent-Cache-Miss-
Renew) problem.
SOLUTION
We patched memcached to add "get_or_lock" instruction to provide Defer-
Expiration function. Sample code first:
$val = $memcache->getOrLock($key);
if (!$val) {
$val = $db->query($sql);
$memcache->set($key, $val, $expire);
}
When use "get_or_lock" and cache-hit, no different behaviour with
current memcached's "get" implements. But when cache-miss, and expired
less than specific defer-expire time, e.g. 3 seconds (configable),
then first two "get_or_lock" requests will got cache-miss and others
got the staled value per second. When cache expired eq or above 3
seconds, the behaviour becames same as classic "get" again. That's
all.
Where the "get_or_lock"'s behaviour is unacceptable, we can simply
switch back to use "get". No comflicts with each other.
About defer `delete` function, Sample code first too:
$memcache->delete($key, $hold);
This is only recalled the deprecated memcached function but use
reliable and consist expire model the "get_or_lock" enforced.
Please note, on memcached text protocol, "get_or_lock"'s command is
'lget', 'lgets', etc. On binary protocol, I use
PROTOCOL_BINARY_CMD_LOCKBIT (0x80) to indicates locked version 'get',
'gets' and 'getk'.
CONCLUSION
--
We use "get_or_lock" combine with defer "delete" gains performace and
stablity on our site on high visits period. Adopt these modifications
makes our site's HTTP 502 statistics down from 12000~14000 to 50~100
per week.
Re: Memcached "get_or_lock" and defer "delete" functions Proposal
I've upload my patch:
http://soplwang.com/my-file/memcached-1.4.5-get_or_lock.zip
hope it's useful.
regards,
soplwang
2011/6/29 Wenlin
> Memcached "get_or_lock" and defer "delete" functions Proposal
>
> ABSTRACT
>
> On busiest web sites who depend on memcache technology, when cache
> expired or deleted, they should face database query flood. This is the
> Concurrent-Cache-Miss-Renew problem. This proposal provide a Defer-
> Expiration mechanism to solve the problem.
>
> This proposal also recall the defer "delete" function back to solve
> frequent delete problem.
>
> MOTIVATION
> --
> On our web site, always we use following piece code to acting with
> memcache:
>
>
> $val = $memcache->get($key);
> if (!$val) {
>$val = $db->query($sql);
>$memcache->set($key, $val, $expire);
> }
>
>
> If $sql is large time consumed, then when cache expired on high visits
> period, we should face database load too high problem.
>
> Why? Because $sql is complicate, then the database query should need a
> bit long time. Before the database query complete, there should be a
> lot of concurrent requests got cache-miss and do same cache-renew
> process. Too many concurrent and complicate $sql query should slow-
> down the database execution and let more requests fall in cache-miss
> and cache-renew hell. This is a positive feedback until the cache be
> renewed lastly.
>
> In our practice, this problem led our site unstable on high visits
> period randomly. And, when it happens, always need several seconds to
> get back stable.
>
> About defer `delete` function, when we frequent update database and
> delete cache entry (e.g., delete entry 20 times in 1 second), we will
> got lots cache-miss and enhanced the above (Concurrent-Cache-Miss-
> Renew) problem.
>
> SOLUTION
>
> We patched memcached to add "get_or_lock" instruction to provide Defer-
> Expiration function. Sample code first:
>
>
> $val = $memcache->getOrLock($key);
> if (!$val) {
>$val = $db->query($sql);
>$memcache->set($key, $val, $expire);
> }
>
>
> When use "get_or_lock" and cache-hit, no different behaviour with
> current memcached's "get" implements. But when cache-miss, and expired
> less than specific defer-expire time, e.g. 3 seconds (configable),
> then first two "get_or_lock" requests will got cache-miss and others
> got the staled value per second. When cache expired eq or above 3
> seconds, the behaviour becames same as classic "get" again. That's
> all.
>
> Where the "get_or_lock"'s behaviour is unacceptable, we can simply
> switch back to use "get". No comflicts with each other.
>
> About defer `delete` function, Sample code first too:
>
>
> $memcache->delete($key, $hold);
>
>
> This is only recalled the deprecated memcached function but use
> reliable and consist expire model the "get_or_lock" enforced.
>
> Please note, on memcached text protocol, "get_or_lock"'s command is
> 'lget', 'lgets', etc. On binary protocol, I use
> PROTOCOL_BINARY_CMD_LOCKBIT (0x80) to indicates locked version 'get',
> 'gets' and 'getk'.
>
> CONCLUSION
> --
> We use "get_or_lock" combine with defer "delete" gains performace and
> stablity on our site on high visits period. Adopt these modifications
> makes our site's HTTP 502 statistics down from 12000~14000 to 50~100
> per week.
>
Re: Failed reading line from stream (0): over 1'000'000 pages on google and no fix?
> In the logs:
> Notice: Memcache::get() [memcache.get]:
> Server localhost (tcp 11211) failed with: Failed reading line from
> stream (0) in /var/www/html/inc/chat/libraries/server/NodeJS.php b> on line 37
> {"r":"registered"}
>
> At line 37:
> $session = json_decode($this->memcache->get('session/' . $cookie-
> >sid));
I hate that client...
That's either a timeout, or a corrupt key?
Re: Issue 209 in memcached: ¿could we reset stats counters when i flushes memcacheds?
Updates: Status: WontFix Comment #1 on issue 209 by dorma...@rydia.net: ¿could we reset stats counters when i flushes memcacheds? http://code.google.com/p/memcached/issues/detail?id=209 flush_all is lazy and does not free up any memory. items would be removed as they are fetched, and found to have been flushed.
Re: problem with compiling 1.6 beta on Windows
From a clean repo with: make -f win32/Makefile.mingw Cheers, Trond On 28. juni 2011, at 09.58, Rafal Likus wrote: > Ok, I downloaded latest MSysGit, and MinGW, both gives the same > result. > I downloaded official beta and latest snapshot of Memcached. > Copied m4/version.m4 from official beta to snapshot. > And: > ./config/autorun.sh - works OK - this not works in official beta. > ./configure - works OK. > make - gives errors. > The most strange for me is > gcc.exe: unrecognized option '-pthread' > > pthreads dlls and header files are in bin and lib directories. > > What am I doing wrong? > Nobody builds on Windows except Core Team - how do You do this? > > Maybe I should build MinGW from scratch? > > Can you help? I will be glad if I could test this version. > > Full dump from make: > > $ make > make all-am > make[1]: Entering directory `/c/Temp/memcached-16b7' > /bin/sh ./libtool --tag=CC --mode=compile gcc -std=gnu99 - > DHAVE_CONFIG_H -I. -I./include -I./libevent -I./utilities -I./include > -I./libevent -fvisibility=hidden -pthread -g -O2 -Wall -Werror - > pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls > -MT libmemcached_utilities_la-engine_loader.lo -MD -MP -MF .deps/ > libmemcached_utilities_la-engine_loader.Tpo -c -o > libmemcached_utilities_la-engine_loader.lo `test -f 'utilities/ > engine_loader.c' || echo './'`utilities/engine_loader.c > libtool: compile: gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I./include -I./ > libevent -I./utilities -I./include -I./libevent -fvisibility=hidden - > pthread -g -O2 -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing- > declarations -Wredundant-decls -MT libmemcached_utilities_la- > engine_loader.lo -MD -MP -MF .deps/libmemcached_utilities_la- > engine_loader.Tpo -c utilities/engine_loader.c -DDLL_EXPORT -DPIC - > o .libs/libmemcached_utilities_la-engine_loader.o > gcc.exe: unrecognized option '-pthread' > cc1.exe: warnings being treated as errors > utilities/engine_loader.c: In function 'load_engine': > utilities/engine_loader.c:32: error: implicit declaration of function > 'dlopen' > utilities/engine_loader.c:32: error: 'RTLD_NOW' undeclared (first use > in this function) > utilities/engine_loader.c:32: error: (Each undeclared identifier is > reported only once > utilities/engine_loader.c:32: error: for each function it appears in.) > utilities/engine_loader.c:32: error: 'RTLD_LOCAL' undeclared (first > use in this function) > utilities/engine_loader.c:32: error: assignment makes pointer from > integer without a cast > utilities/engine_loader.c:34: error: implicit declaration of function > 'dlerror' > utilities/engine_loader.c:34: error: initialization makes pointer from > integer without a cast > utilities/engine_loader.c:42: error: implicit declaration of function > 'dlsym' > utilities/engine_loader.c:42: error: initialization makes pointer from > integer without a cast > utilities/engine_loader.c:58: error: implicit declaration of function > 'dlclose' > make[1]: *** [libmemcached_utilities_la-engine_loader.lo] Error 1 > make[1]: Leaving directory `/c/Temp/memcached-16b7' > make: *** [all] Error 2 > > > > -- > Regards > Rafal
Is Memcatched will support nearcache and local cache?
Is Memcatched will support nearcache and local cache? Please explain. How i can override the cache configuration? Please explain with example. Thanks & Regards AnanthaRamu Bose
Failed reading line from stream (0): over 1'000'000 pages on google and no fix?
Hi guys,
Ok, I have a problem with the memcache.get, I've been on it for 2 days
and it's still there...
In the logs:
Notice: Memcache::get() [memcache.get]:
Server localhost (tcp 11211) failed with: Failed reading line from
stream (0) in /var/www/html/inc/chat/libraries/server/NodeJS.php on line 37
{"r":"registered"}
At line 37:
$session = json_decode($this->memcache->get('session/' . $cookie-
>sid));
Any idea?
Thanks!
Re: problem with compiling 1.6 beta on Windows
Ok, I downloaded latest MSysGit, and MinGW, both gives the same result. I downloaded official beta and latest snapshot of Memcached. Copied m4/version.m4 from official beta to snapshot. And: ./config/autorun.sh - works OK - this not works in official beta. ./configure - works OK. make - gives errors. The most strange for me is gcc.exe: unrecognized option '-pthread' pthreads dlls and header files are in bin and lib directories. What am I doing wrong? Nobody builds on Windows except Core Team - how do You do this? Maybe I should build MinGW from scratch? Can you help? I will be glad if I could test this version. Full dump from make: $ make make all-am make[1]: Entering directory `/c/Temp/memcached-16b7' /bin/sh ./libtool --tag=CC --mode=compile gcc -std=gnu99 - DHAVE_CONFIG_H -I. -I./include -I./libevent -I./utilities -I./include -I./libevent -fvisibility=hidden -pthread -g -O2 -Wall -Werror - pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -MT libmemcached_utilities_la-engine_loader.lo -MD -MP -MF .deps/ libmemcached_utilities_la-engine_loader.Tpo -c -o libmemcached_utilities_la-engine_loader.lo `test -f 'utilities/ engine_loader.c' || echo './'`utilities/engine_loader.c libtool: compile: gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I./include -I./ libevent -I./utilities -I./include -I./libevent -fvisibility=hidden - pthread -g -O2 -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing- declarations -Wredundant-decls -MT libmemcached_utilities_la- engine_loader.lo -MD -MP -MF .deps/libmemcached_utilities_la- engine_loader.Tpo -c utilities/engine_loader.c -DDLL_EXPORT -DPIC - o .libs/libmemcached_utilities_la-engine_loader.o gcc.exe: unrecognized option '-pthread' cc1.exe: warnings being treated as errors utilities/engine_loader.c: In function 'load_engine': utilities/engine_loader.c:32: error: implicit declaration of function 'dlopen' utilities/engine_loader.c:32: error: 'RTLD_NOW' undeclared (first use in this function) utilities/engine_loader.c:32: error: (Each undeclared identifier is reported only once utilities/engine_loader.c:32: error: for each function it appears in.) utilities/engine_loader.c:32: error: 'RTLD_LOCAL' undeclared (first use in this function) utilities/engine_loader.c:32: error: assignment makes pointer from integer without a cast utilities/engine_loader.c:34: error: implicit declaration of function 'dlerror' utilities/engine_loader.c:34: error: initialization makes pointer from integer without a cast utilities/engine_loader.c:42: error: implicit declaration of function 'dlsym' utilities/engine_loader.c:42: error: initialization makes pointer from integer without a cast utilities/engine_loader.c:58: error: implicit declaration of function 'dlclose' make[1]: *** [libmemcached_utilities_la-engine_loader.lo] Error 1 make[1]: Leaving directory `/c/Temp/memcached-16b7' make: *** [all] Error 2 -- Regards Rafal
Issue 209 in memcached: ¿could we reset stats counters when i flushes memcacheds?
Status: New Owner: Labels: Type-Defect Priority-Medium New issue 209 by marc.cor...@gmail.com: ¿could we reset stats counters when i flushes memcacheds? http://code.google.com/p/memcached/issues/detail?id=209 What steps will reproduce the problem? 1. When i've launched "flush_all" to instance's socket. What is the expected output? What do you see instead? Counters curr_items/total_items would be reset What version of the product are you using? On what operating system? memcached-1.4.5-1 in Red Hat Enterprise Linux Server release 5.6 (Tikanga) Please provide any additional information below.
Re: Memcached installation issue.
http://pecl.php.net/package/memcached
http://pecl.php.net/package/memcache
if you are using memcached, i think here is the right place, since it
use libmemcached
2011/6/28 Chetan Gadgilwar :
> My server is running but havent talk to memcache pecl extension guys, where
> i can post my issue any link?
>
>
> On Mon, Jun 27, 2011 at 11:40 PM, Roberto Spadim
> wrote:
>>
>> maybe you server isn´t running, did you tried to talk with memcache pecl
>> extension guys?
>> did you tried memcached extension too?
>>
>> 2011/6/27 Chetan Gadgilwar
>>>
>>> Hi Guys,
>>>
>>> I solved an installation issue by replacing a compatible .dll extension.
>>>
>>> I am running a following piece of code on my localhost
>>>
>>> >> /* OO API */
>>> $memcache_obj = new Memcache;
>>> $memcache_obj->connect('127.0.0.1', 11211) or die ("Could not connect");
>>> $memcache_obj->set('any_key', 'some value', 60);
>>> echo $memcache_obj->get('any_key');
>>> ?>
>>>
>>>
>>> But its not working, showing "Could not connect".
>>> Any idea?
>>>
>>> On Mon, Jun 27, 2011 at 9:57 PM, Chetan Gadgilwar
>>> wrote:
I am new with memcached.
I am trying to install a memcached on my local machine which is windows
vista.
Apache version is 2.2.11 & php version is 5.3.0
I used this link for installation
http://pureform.wordpress.com/2008/01/10/installing-memcache-on-windows-for-php/#respond
But still i am getting Fatal error: Class 'Memcache' not found
I check an apache error logs & i found
Warning: PHP Startup: memcache: Unable to initialize module
Module compiled with module API=20060613
PHP compiled with module API=20090626
I think my php_memcache.dll is not compatible, which is downloaded from
http://blog.eood.cn/windows-php-memcache-dll-download
i am not able to figure out whats the problem exactly.
Is any idea why its happening, please suggest me & help me out because
its only a starting point to memcahced.
--
Best wishes,
Chetan Gadgilwar
>>>
>>>
>>>
>>> --
>>> Best wishes,
>>> Chetan Gadgilwar
>>
>>
>>
>> --
>> Roberto Spadim
>> Spadim Technology / SPAEmpresarial
>
>
>
> --
> Best wishes,
> Chetan Gadgilwar
>
--
Roberto Spadim
Spadim Technology / SPAEmpresarial
Re: Issue 208 in memcached: Is Memcatched will support nearcache and local cache? Please explain.
Updates: Status: Invalid Comment #1 on issue 208 by trond.no...@gmail.com: Is Memcatched will support nearcache and local cache? Please explain. http://code.google.com/p/memcached/issues/detail?id=208 Please don't use the issue tracker to ask questions. use the mailing list for that
Issue 208 in memcached: Is Memcatched will support nearcache and local cache? Please explain.
Status: New Owner: Labels: Type-Defect Priority-Medium New issue 208 by rainbowa...@gmail.com: Is Memcatched will support nearcache and local cache? Please explain. http://code.google.com/p/memcached/issues/detail?id=208 Is Memcatched will support nearcache and local cache? Please explain.
