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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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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694 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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1answer
310 views

Memcached server: Is it a good practice to point two server urls to the same server?

I have a system where there are connections to a memcache server from several different files and servers. I would like to stay with one server but keep the option of increasing the number of ...
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1answer
1k views

How does upstream works in nginx (memcached_pass)?

Does nginx go to the next host in upstream block, if previous host not available or doesn't exist? upstream cache_cluster { 127.0.0.1:9000; //something on this port 127.0.0.1:11211; ...
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7k views

Memcached memory usage

Is there any command line or php script which returns the memcached total memory usage?
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635 views

Memcached has to start by nobody? How to start it?

How to start the daemon by nobody? Do I have to start as nobody? I have only one box. So how many ports can I give to the daemon?
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167 views

Choose which memcache version

For memcached server we are running on version 1.4.5, and the application is built with PHP 5.3.6 and memcache (http://pecl.php.net/package/memcache) version 3.0.5 Currently we have 2 memcached ...
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2answers
2k views

Multiple Magento web servers, single instance memcache issues

I have two web servers with a Magento instance on both. Each shares the same httpd.conf, php.ini and my.cnf, along with local.xml and config.xml magento configuration files. I have another server ...
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2answers
4k views

Configure php5-fpm for many concurrent users

EDIT: Added some configs and a clarification on how many is "many", as requested by anthonysomerset. EDIT 2: Added fastcgi_cache to nginx config, as suggested by SleighBoy. I run a server for a ...
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694 views

When set SESSION_ENGINE to memcached, Django website halts

I have set up memcached in Django using Pylibmc binding: CACHES = { 'default': { 'BACKEND': 'django.core.cache.backends.memcached.PyLibMCCache', 'LOCATION': ['10.241.1.1:11211', ...
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2answers
369 views

Memcached scaling strategy

Currently I am running a production environment with 4 dedicated memcached servers, each of them having 48Gb of RAM (42 dedicated to memcache). Right now they are doing fine, but traffic and content ...
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1answer
2k views

Confused about caching solution: MemCache, Varnished, mod_cache, else?

I have a very heavy site in my server. The load of the server is always about 30-50 and sometimes it become even 150 and server work really hard. I'm looking for a caching solution that can increase ...
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150 views

Close port 1121

How can I open port 1121 for specified ips? I have memcache installed, and I need to access to memcache from another server for this in /etc/memcached.conf I set my ip -l 192.0.0.106. But after this ...
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377 views

Pros and cons of one vs several memcached instances on the same server [duplicate]

Possible Duplicate: Memcached - one large instance vs many smaller I know this might depend on my specific scenario but if possible let's analyze it in general :) I wonder if using 6 ...
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1answer
290 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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925 views

Need a little advice with apc, node.js, varnish, memcached, nginx

Just need a little advice here if anyone can help. Currently i have nginx running on a virtual private server, i am looking into installing node.js so i can use AjaxIM (http://ajaxim.com/) , and ...
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1answer
1k views

Having problems with maintaining sessions across multiple Amazon EC2 instances

One of my sites is hosted via Amazon EC2 service. The problem starts happening when the site faces a heavy load which in turn spawns a new EC2 instance via AutoScaling. This is good but the issue is ...
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490 views

Memcached can't connect with php

I have centos 5.3 and I just installated memcached 1.4.2. I can telnet it fine and do stats, etc., but when I try to connect to it over php I get an error that it can't connect. It was SELinux.
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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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701 views

600+ memcache req/s problems - help!

I am running memcached on my server and when it hits 600+ req/s it becomes unstable and causes a big load of problems. It appears when the request rate gets that high, my PHP applications at random ...
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2answers
8k 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 ...
6
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3answers
14k views

How to setup Memcached/APC on Ubuntu Server 10.04 for PHP?

I will be soon setting up Simple Machines forum on a fresh Ubuntu Server 10.04 VPS. The forum software is written in PHP. I will using Nginx as the web server, and I will be following a guide to ...
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3answers
5k views

php_memcache dll for windows - where can I find it?

This is the only link I've found, but it doesn't work. http://pecl4win.php.net/ext.php/php_memcache.dll Where can I find a precompiled dll for the php_memcache extension?
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2answers
748 views

Why is Memcached not working with vBulletin?

I have Memcached configured and setup to with work with vBulletin 4.1.5 on a Gentoo Linux 32-bit Linode VPS. Memcached is started, includes/config.php is configured to use the memcache, and the site ...
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1answer
235 views

PHP APC MAJOR Fragmentation Issues?

So I have been using memcached to cache lots of data that was the result of queries to the database. Everything left at default, and on average I stored < 40MB in memcache. I used memcache.php to ...
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180 views

Memcached and Mysql architecture

Right now we have 2 servers. webserver + memcached mysql server the mysql server is a new and a strong server and it is not being utilized fully. I was debating if I should migrate the memcached ...
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96 views

Optimizing Server

Let me lay it all out: Lamp environment Mysql is already optimized. I've got memcached setup I've got APC setup Traffic on these web servers is going to come in hard and fast, its not going ...
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1answer
458 views

Failover strategy for memcached

I am trying to understand how memcached works (newbie) to anticipate the sudden failure of a node using/offering memcached. I have a couple of questions to ask: i) If a have a system with 3 nodes ...
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2answers
487 views

Memcached possibly leaking memory

I am having a really odd problem and I am lost a bit as I do not know what to do any more. We are running in production 4 dedicated memcached boxes. All boxes have 48Gb of RAM, they are running ...
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1answer
38 views

Storing cached files so they are accessible by more than one server

I want to start using multiple front-end Apache servers for my website. At the moment I store various HTML files in a caching directory, e.g. "/htmlcache/homepage.html" Obviously I don't want to ...
2
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1answer
582 views

Amazon EC2 ELB directing load to other instances and session stores

If we scale up (add an instance to ELB), could we redirect some existing requests to the new instance. So that, The users that we force to a new server will be asked to login again If we scale down ...
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316 views

Can Memcached limit “write per second” and “read per second” on MySQL?

I need to reduce the value of "write per second" and "read per second" on MySQL (this is for statistics: total views of post). Can Memcached doing this job? Thanks
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Memcache - Issues in a distributed environment with many nodes

I've had a quick look through the other similarly titled questions and none are particularly similar to the issues I'm currently having. Basically, we've had a multi node memcached ring running for ...
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how to install pecl memcached?

i need to install memcahced (not memcache) on my computer (ubuntu 10.10 and php 5.3.3), i did the follwoing: $ apt-get install php5-memcached libmemcached-tools libmemcached5 =>DONE SUCESSFULLY $ ...
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1answer
253 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
640 views

Deploying Memcached as 32bit or 64bit?

I'm curious about how people deploy memcached on 64 bit machines. Do you compile a 64bit (standard) memcached binary and run that, or do people compile it in 32bit mode and run N instances (where N = ...
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1answer
250 views

How do I let memcached be accessed from another machine?

So I have been using memcached with a new django app and it works great, I can serve the dynamic version of the site slighly faster than if I mirror the files to a static sever. I have this setup on a ...
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3answers
402 views

improve mysql server speed for an app hosted on VPS

I'm running several applications on my VPS. These apps are built with PHP and used in a social network. Currently, I have some problems with the server's speed. My VPS has the following ...
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2answers
205 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
188 views

In Nginx, can I handle both a location:url or a content-type: text/html response from memcached?

I'm setting up an nginx - apache reverse proxy where nginx handles the static files and apache the dynamic. I have a search engine and depending on search parameter I either directly forward the ...
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1answer
223 views

Multi-Application Server Environment and Memcached Security

We are looking to integrate Memcached into our infrastructure, but have a security concern before we do. We run several platforms including ASP.NET and Coldfusion and have many app developers working ...
2
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1answer
774 views

memcached php module not compiling on EC2

I'm trying to do this on EC2, micro instance using amazon linux I installed and started the memcached service without problems. But when trying to make the php part using pecl it told me pecl wasnt ...
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3answers
368 views

Puppet defined resource - selective parameterization?

I'm currently banging my head trying to find the "best way" to achieve this type of granularity for puppet: I have a server running memcached in testing environment and another one running for the ...
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2answers
1k views

Is it possible to install apc, memcached, nginx and varnish all together?

Just wondering if it is possible to have nginx, apc, memcached, and varnish all running together. i am currently running on a dreamhost private virtual server, not that it matters. any input would be ...
1
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1answer
141 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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1answer
658 views

Will innodb benefit from memcached?

from - http://www.readwriteweb.com/hack/2011/04/you-got-nosql-in-mysql-memcach.php (correct me if does not make sense) potential benefits saving complex query calculation into distributed ...
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2k views

Setting up memcached/memcache with Php on Ubuntu 10.10

I'm assuming memcache and memcached are two completely different things, and that I want to use memcached. I have two separate servers (one is a webserver, one is meant for the db). I don't know ...
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1answer
400 views

Memcached - one large instance vs many smaller

I will be adding a memcached server to my web app to offload lots of db requests. I'll be mostly caching different small id-name pairs (memberid-membername, blogid-blogname, etc) and expect total ...
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1answer
643 views

Using memcached with upgraded Subversion FSFS repository

Subversion 1.6 release notes suggest that it's possible to use memcached to "cache data of FSFS repositories". Creating a new repository using svnadmin create has a fsfs.conf file within the db/ ...
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330 views

memcached with telnet disabled

If telnet is disabled on my RHL server memcached gives the error of unable to connect to host: myMachine:port number when starting my java web app. Is it mandatory to enable telnet for memcached to ...