Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects). It is commonly used as a cache to speed access to frequently used data.

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Response headers in Memcached+Nginx

Is there any way to cache response headers along with the response body in Memcached for use with Nginx?
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836 views

memcached session handler in php.ini

I have installed memcached and the below code in php.ini works: session.save_handler = memcache session.save_path = "tcp://localhost:11211" but when i try to use the memcached handler.. this is ...
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621 views

Nginx, PHP-FPM and Memcached

I have Wordpress installation running on two web servers powered by Nginx. I configured Memcached on both servers and I'm using W3 total cache plugin for Memcached: What's the recommended solution ...
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1answer
962 views

top on memcached server shows 110% cpu (memcached process) and 55% idle on cpu(s)

I tested on AWS ubuntu 10.04 memcached 1.4.2 When testing with memslap (different concurrent users numbers and different instance types (8G and 1.7G memory) Top shows 110% cpu on the memcached ...
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2k views

How to debug memc/memcached timeouts with Nginx?

Problem Regular timeouts from the memcached backends in Nginx (see example errors below) Things already tested: it occurs both on local and remote memcached servers so the network can't be the ...
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1answer
188 views

MAMP extension won't load

I recently installed MAMP Pro 1.9.5. I followed several tutorials online explaining how to enable memcached. I was able to compile correctly with no errors. I added memcache.so to my php.ini as ...
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3answers
2k views

How to confirm memcache memory increase?

Alright, I have downloaded /etc/sysconfig/memcache And edited the file that contained "PORT="11211" USER="memcached" MAXCONN="1024" CACHESIZE="64" OPTIONS="" to 1000 cachesize. I uploaded the file ...
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3answers
699 views

Launch memcached on boot with cron?

How can I launch memcached on boot?
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537 views

Protecting against PHP session DOS attacks

A popular move is to store PHP sessions in memcached. But it seems like this is wide open to an attack - someone could flood the server for new session requests and consume all your memory. What ...
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2answers
179 views

Site's performance slows over time until Apache is restarted

I'm running a Django app w/ Nginx and Apache. All our static media is stored on S3, and basically it takes a while for the app to check if thumbnails have been created every time a page is loaded. ...
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27 views

How to setup a security group on AWS that allows incoming traffic only by certain Elastic Beanstalk servers?

we have the following setting on AWS: 8 Elastic Beanstalk environments (4 QA, 4 PROD) read and write data. Typically, 1 environment (the API) always reads data from DynamoDB and RDS and 1 environment ...
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103 views

How to specify the timeout for health check in memcached session manager for tomcat

Basically the setup consists of two tomcat6 and two memcached nodes. memcached session manager version - 1.8.3 (latest release). I'm testing the following scenario: Client logs in into the ...
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494 views

PHP Warning: Unknown: Failed to write session data (memcached). Very infrequent

I installed memcached (2.2.0) libmemached (1.0.18) a few weeks ago. (Apache/2.4.10 and PHP 5.5.20), mostly for php session management. Generally I'm really pleased with performance but I notice this ...
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77 views

Uneven load distribution on an elasticache cluster

Amazon elasticache cluster looks to be a really good choice for auto-scaling but it seems the load distribution is not equal among the nodes. Both memory and CPU wise the node 1 seems to take almost ...
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0answers
288 views

Having Memcache and Memcached installed and enabled at the same time

Can I use both Memcache and Memcached php extensions on the same server at the same time? Just to be clear so you dont misunderstand what I mean by this question, here is my scenario: I have both ...
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1answer
86 views

Memcached Pool - Outtage causes increased lag in response time

I have multiple cache servers which are added to a virtual pool at the PHP layer via the Memcached::addServers() api. During fault tolerance testing I noticed that taking one of the memcached servers ...
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1answer
417 views

PHP - Memcached - Libmemcached - Handle cache server outage

I am working on ensuring our app degrades gracefully in case of a complete cache outage, which is highly unlikely, as we have minimum of at least 3 cache nodes to add to the cache pool, by way of ...
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1answer
192 views

Nginx memcached_pass directive unknown

I am setting up a new server instance on AWS and have run into something I don't know how to handle. I've set up exactly the same config on digital ocean before and there issue does not occur at all. ...
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1answer
292 views

memcache and memcached session not persisting

so I am having a problem with sessions persisting in an application, that is using the memcached php driver, while another existing application is using the memcache driver. On the server, I see both ...
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332 views

What is the right value for memcache.session_redundancy?

The PHP manual for Memcache doesn't have any explanation for the memcache.session_redundancy option. The comment on that page (which is 4 years old) says it sets the number of copies of a session ...
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178 views

Why is memcache not functioning with elgg in debian 7?

I am moving a php website (built using elgg - www.elgg.org) from a CentOS server to a different Debian 7 server and have installed memcached + php5-memcache on both. I have recreated all the ...
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1answer
2k views

Intercepting 404 with nginx as reverse proxy for memcached + node.js

I'm using nginx as a reverse proxy to look up html content from memcached, if not present, then node.js, if not even there, node.js returns 404. What I'm trying to do is intercept and deliver a custom ...
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355 views

Memcached with SASL: Couldn't find mech PLAIN

I'm trying to get memcached working with SASL. I'm compiling memcached and libevent from source. These are the steps I took (both under root and a user, same result): Having these packages: ...
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272 views

Different memcached instance per user, with authentication

I am writing a script which will allow each and every cPanel user to run an instance of memcached on their own. The script at this point is starting the daemon for every user on a different port. ...
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1answer
938 views

Stopping memcached: [FAILED]. Why?

My application seems to be having issues with memcached not stopping. I'm using php, and have specific keys expiring after every hour. However those keys & values are not repopulating anymore. ...
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2k views

upstream prematurely closed connection while reading response header from upstream, client

I'm using nginx and spawnf-cgi with apc and memcache enabled.I'm getting 502 bad gate way on browser and this error on error log. 2013/01/07 06:55:46 [error] 90799#0: *53 upstream prematurely closed ...
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377 views

Memcache Error? “Could not find specified socket in poll list.”

For some reason recently I've been getting this error in my apache error log on my server. We have a single instance of memcached running on our Mac OSX 10.7 server. (20014)Internal error: Unknown ...
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142 views

Is memcache impacting my performence negatively?

I am using pressflow 6 and NewRelic seems to suggest that memcache is infact hurting performance as shown below : My settings.php file : # Varnish reverse proxy on localhost $conf['reverse_proxy'] ...
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224 views

windows 2003 server - php_memcache.dll for PHP version 5.3?

(I posted this in stack overflow about 15 hours ago - but I was told that stack overflow >was not the right forum by the admins for this question, so I'm hoping that this is the >correct forum.) ...
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146 views

Should we increase local port range limit on busy memcached servers

nixcraft has a tutorial on configuring memcached server(link) at the end says: For busy memcached server you need to increase system file descriptor and IP port limits here is the code to do ...
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1answer
126 views

MediaWiki Multi Site + Memcached

I have multiple mediawiki installations, and I'm wondering if it's safe to allow them to all use the same memcached server. Are there any "gotchas" involved?
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1answer
329 views

how can I effect DNS Caching on PHP/Memcache application

In a very high loaded Ubuntu/PHP web server I found that the PHP line: $memcache->connect("int-aws_ec2.memcached.myapp.net",11211); sometimes takes ~5 secs. Replacing the url with the ip address ...
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550 views

Memcached and repcached not replicating 2 master servers

I have memcached-1.2.8-repcached-2.2 installed on memcached on centos. They install went great and when i start memcached i get: replication: connect (peer=192.168.1.2:11212) replication: marugoto ...
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1k views

Optimizing Web Server(apache2+nginx+memcached+eaccelerator) for high-loaded heavy application

I have a server with (Apache2 + nginx as reverse proxy, memcached cache and eaccelerator). The application is Magento - it is very heavy, due to high modularity and a lot of php files(5000-10000+). ...
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378 views

repcached broken sync - memcached high avalaibility

I have been using repcached (memcached-1.2.8-repcached-2.2)to store php sessions in order to have a highly available memcached. Everything runs perfect, I can restart a daemon without losing sessions. ...
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1answer
211 views

Tips setting up nginx as proxy for php and node frameworks

We have a current, soon-to-be legacy PHP app installed in production, served with apache. Working fine. Currently trying to add in new Node.js alpha stack, which we're planning to install alongside ...
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2answers
903 views

Better performance with memcached cluster or local memcaches?

I have a small cluster of servers balancing a Java web app. Currently I have 3 memcached servers caching data and all web apps shares all 3 memcached instances. I often get strange slowdowns and ...
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1answer
277 views

My ubuntu server can ping and ssh can connect, but ssh can't do the authuncation and halt

I have two ubuntu server. Each running php-cgi by phpfpm, memcached, mongodb. And these servers are not running in a high load state. After running several days. The server will halt. No service and ...
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1answer
334 views

php with apc+memcache+squid

I have a basic php installation. I want to install apc + memcached and squid to speed up the website. I have run into various resouorces regarding this, but one thing is not clear. Should php be in ...
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2answers
1k views

high load web server setup

I'm preparing a server setup for a dating website who need to be able to process around 5'000 - 10'000 req/sec to the main site. My idea was to do it this way: Server for static content (css, js, ...
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2answers
208 views

memcached append() php ubuntu - bad protocol

I am running ubuntu gutsy(7.1) , php5 and I am trying to get memcached running locally. I installed everything as per the docs: memcached daemon, php PECL extension, libevent, etc. But now I can ...
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1answer
274 views

Memcached is slowing down the website in VirtualBox [closed]

I noticed our web project (Drupal) runs slower when it's using memcached in the virtual box. The page load time is more the twice as fast without memcached. I haven't noticed any unnatural memcached ...
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2answers
385 views

Can memcache invoke a script to reload itself after startup on Ubuntu?

Since memcache stores everything in ram, it will lose its store after a node recovers from failure. Does memcache offer a hook to invoke a script after it starts up? We want that script to do ...
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2answers
19k views

Connecting to memcached “what port to use?” (php)

I've installed memcached perfectly and i can created a new instance but i don't understand if I'm connection to the right port... I always get a false return from get(key) Here is my code, $sql ...
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4answers
564 views

Is it possible to run multiple instances of the same application with a single memcached server?

I have two applications with exactly the same code using memcached in identical ways. Does memcached tell the difference between the two apps, and is it safe to run them on the same server with a ...
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3answers
3k views

memcached and PHP … massive lag with sessions

I'm working on a new server built with Unbuntu 10.04, running php-fastcgi, nginx, and memcached. phpinfo() script loads and works great, same as a test memcached script. For any script using ...
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1answer
5k views

How do you safely replicate Memcached data?

I have ~100GB of data running on several Memcached servers, but we're migrating all of our infrastructure to Amazon AWS so I'd like to find a way to replicate this information on these new servers. ...
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2answers
1k views

Memcached will not start

I have this in my /usr/local/: libevent-1.4.so.2 memcached When I do this, it will not start: ./memcached -d -u root -m 3900 -p 11211 ./memcached: error while loading shared libraries: ...
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3answers
5k views

Installing PHP 5.3 Pear on centos 5.8

I just created a VPS with 32 bit Centos 5.8 and installed php53 and a host of other php 5.3 packages. I would like to install memcached using yum but I get the following error Resolving Dependencies ...
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1answer
88 views

Should memcached be installed before or after cpanel? [closed]

I want to install memcached. I want to know if I should install cpanel first, or after the memcached installation