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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PHP-FPM save sessions in memcached

I'm trying to switch my session_handler to memcached, I'm not sure if it worked, it does not look like it did. vi /etc/php5/fpm/php.ini session.save_handler = memcached session.save_path = ...
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memcached install issues with lib event on server

I've installed libevent on my server in the directory root/data/ and have i'm about to install memcached with ./configure –with-lib-event=/data/; make; make install However, after running a bit I ...
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13 views

memcached for php sessions on seperate server?

Is it better to have memcached on its own server(s) for php sessions rather than putting it on one of the web servers? My thought is if one of the web servers goes down; it goes down for everyone ...
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16 views

session.save_handler memcached cluster/failover

I found the following article about clustering memcached; but it uses the memcache php extension and I am using memcacheD extension. Here is the article: ...
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1answer
4k views

How to secure memcached?

In Debian, I have installed memcached (using this guide) to lower the otherwise unmanageable load on mysql database. The database is on a separate server, and memcached and Varnish are on the front ...
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1answer
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Why memcached takes much more memory than specified in its configuration

I have set Item Size to 128M and Maximum Memory to 1024M in my memcached configuration. But when I run this command: ps -eo pmem,pcpu,vsize,pid,cmd | sort -k 1 -nr | head -5 I get 71.7 0.0 ...
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21 views

How to decide on which server to install memcached?

I have two separate servers: Server A is a nginx web server Server B is a MySQL server Both servers are on a private network. How do I decide where to install memcached? What factors should be ...
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4answers
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How to specify the log file for memcached on RHEL / CentOS

I'm running memcached 1.4.5 on RHEL5.5. I installed this using yum which has installed the standard memcached script in /etc/init.d and the configuration file in /etc/sysconfig/memcached: ...
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4answers
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Memcached status returning “memcached dead but pid file exists”

When I want to see the status of memcached I run service --status-all but I get this multiple times "memcached dead but pid file exists" when it lists memcached. It seems to me that this means ...
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29 views

Reload memcached config without restarting or losing cache

I've changed (increased) the -m value in /etc/memcached.conf and I'd like memcached to refresh the configuration file to use the new settings, but I don't want to lose the rather large, existing cache ...
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12 views

Memcached in Munin

I tried to configure the munin to load the memcached plugin. But the memcached plugin wont show up when i add the --suggest to the munin-node-configure command. But i appear when i do not add that ...
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42 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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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
44 views

APC Extension unable to load dynamic library /usr/lib/php5/20090626/apcu.so

I have installed using this Tutorial https://www.23systems.net/2009/07/installing-alterative-php-cache-apc-with-plesk-on-ubuntu/ and all is running fine. Even APC is caching everything and apc.php ...
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3answers
10k views

How to set up memcached to use unix socket?

While I could use memcached on Debian to use the default 11211 port, but I've had great difficulty setting up unix socket, Form what I'v read, I know that I need to create a memcache.socket and add ...
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3answers
456 views

Sudden increase in CPU usage and server response time

Over the past 10 days, I'm suddenly experiencing increased CPU usage on my website with CPU usage reaching 100% three times. During that time I'm unable to SSH to my website so I haven't been able to ...
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2answers
197 views

Memcached vs Amazon Elasticache with PHP on CentOS 7

I setup a new CentOS 7 server in Vagrant to run PHP, nginx, MySQL (MariaDB) and memcached (note the d on the end). I can get memcached to run fine, but I can't get the Amazon Elasticache .so file to ...
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NGINX + memcached, location not found

I want to configure nginx to read directly from memcached by key "match_1" for example. This is my server configuration server { listen 8080; server_name localhost; location /get_match ...
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4answers
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Yum install php-pecl-memcached - No package found (Have epel-release-6-8.noarch.rpm)

I believed I've downloaded and updated the EPEL rpm but I can't install php-pecl-memcached.. I'm very new to this, any help is appreciated. #rpm -Uvh epel-release-6-8.noarch.rpm warning: ...
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1answer
124 views

Install memcached PHP extension on openSUSE 13.2

Is there a standard/supported way to get the memcached extension for PHP installed on openSUSE 13.2? On CentOS this was a case of yum -y install php-pecl-memcached. But it doesn't look like the ...
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1answer
156 views

Problems installing PECL extension Memcache

I have installed memcached fine and seems working properly , and now I will need to install PECL extension memcache. Im running Centos 6.2 x86_64 .When I try to install gives me this error at the ...
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3answers
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How to debug memcached “SERVER HAS FAILED AND IS DISABLED UNTIL TIMED RETRY” errors?

I have a two server memcached setup. When memcached write fails, I receive an email notification. About once per day "SERVER HAS FAILED AND IS DISABLED UNTIL TIMED RETRY" error comes and I have no ...
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1answer
86 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
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Memcached removes data too early when -M option not specified

We are using memcached as a storage for php sessions and almost from the beginning noticed that sessions disappears too early (say, in 20-30 minutes instead of 3 hours as speicified in php memcached ...
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2answers
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error while installing the libmemcached

I get this while installing libmemcached root@server [/libmemcached]# make make all-am make[1]: Entering directory `/libmemcached' if /bin/sh ./libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H ...
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View content of memcached

Are there any tools to explore what is currently cached inside a memcached pool? Not some much graphs, but the actual key/values currently stored.
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65 views

Memcached no get_hits

I have a problem with memcached on Centos 6 with apache on port 8080 and Nginx on port 80 as reverse proxy for apache. I install Memcached to cache all static file : Here is my memcached configuration ...
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1answer
45 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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1answer
66 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
69 views

Why is Memcache not starting automatically?

I installed memcache in my CentOS server, and the respective libraries for php as well: Despite having installed both of them, I ended using Memcache $memcache = new Memcache; Since I wanted the ...
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2answers
433 views

Elasticsearch as memcache replacement

I am looking into replacing memcached with elasticsearch. Basically, I need to reduce my software stack and since I will be using elastic for searching, I was thinking of creating an index that will ...
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2answers
913 views

How to find max connections used by memcached?

In our LAMP application we have increased the max connection value for memcached to very high to avoid error for max connection we were having. Now we want to set appropriate value to max connections ...
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windows firewall & memcached service: open ports on firewall for local use?

memcached is used in local connected via 127.0.0.1:11211 on Windows Server 2008. Everything seems to work without having set anything on the firewall. But, can not understand if i must open 11211 ...
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2answers
755 views

PHP memcached session redundancy

I'm trying to follow How To Share PHP Sessions on Multiple Memcached Servers article and implement that to my environment: /etc/php.d/memcache.ini: # grep -v ^\; /etc/php.d/memcache.ini ...
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326 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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5answers
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Can a pool of memcache daemons be used to share sessions more efficiently?

We are moving from a 1 webserver setup to a two webserver setup and I need to start sharing PHP sessions between the two load balanced machines. We already have memcached installed (and started) and ...
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1answer
452 views

Should I install memcached on my Level 3 VPS?

I have a Level 3 VPS Linux server from Hostgator that I pay $50/month for. I know nothing about servers, but I'm aware this isn't the cheapest around, but far from the most expensive. On the domain ...
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1answer
186 views

Configuring MAXITEMSIZE in memcached in gentoo

Got memcached up and running (emerged net-misc/memcached) but on PHP I'm getting Server 127.0.0.1 (tcp 35817, udp 0) failed with: SERVER_ERROR object too large for cache I'm thus trying to change ...
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82 views

Counterintuitive drop in CPU

I am running a memcached service in a linux container pinned to a specific physical core. As expected the CPU increases when the number of requests increase. The requests are sent from a workload ...
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1answer
48 views

Different server response time for 2 web pages with the same view and template?

I've recently been facing hugely increased server response time for some of my web pages (response time in the range of 10-20 seconds). For example, for the page http://www.edmhunters.com/afrojack/ - ...
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increasing memcached limit size

I am having issues with the limit size of my memcached: How do I increase the limit_maxbytes? as the bytes_written is more than the limit_maxbytes?
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1answer
134 views

Allow Apache use more memory

I use apache2 behind nginx on 8 core CPU 48GB RAM server. Now my system uses only 3GB of all memory, but there are high load on CPUs. How can I use my free memory instead of CPUs time? I also use ...
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Setup Server for Optimization [duplicate]

I've got my first Dedicated server and I would like some help with the Optimization of it. I am thinking of going a bit different than the regular setup and I'd like your feedback. Before we start, ...
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318 views

Flush mod_pagespeed configured with memcached

I just switched from a single LAMP (mod_pagespeed, SSL, APC, localhost memcached) server to a multi server setup. On the old server mod_pagespeed was not configured for memcached, only file based. ...
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2answers
5k views

Memcached problems “failed to listen on TCP port 11211”

I just installed memcached on my Mac OS X 10.6.8. It installed perfectly and when I type in memcached in Terminal I get this: failed to listen on TCP port 11211 tcp listen: Address already in use ...
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Installing memcached deamon on Centos PHP conflicts

I have Centos 5.10 installed on my server and tried running the following command yum install php53u-pecl-memcached.x86_64 Setting up Install Process Resolving Dependencies --> Running transaction ...
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169 views

Increased CPU usage and server response time

Over the past 10 days, I'm suddenly experiencing increased CPU usage on my website with CPU usage reaching 100% three times. During that time I'm unable to SSH to my website so I haven't been able to ...
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1answer
2k views

How much memory can I safely assign to memcached?

I'm looking into using memcached on our server. We've just upgraded and now have a fairly powerful box: DELL PowerEdge R710 Linux RHEL 5 - 64bit 12GB RAM (We used to be on a 32bit 4GB box). The ...
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1answer
170 views

Is it possible to force a specific program to use virtual memory?

Let say I have 1GB RAM Ubuntu, I need to run both memcached and redis on the same machine The usage of memcached is quite heavy (e.g. 1K read per second) and redis is less heavy (but still 10 read ...
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484 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 ...