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Problem enabling memcached.

OldCoals

Active member
#1
If the following is enable in config.php I receive an error when trying to access the forum.

An unexpected error occurred. Please try again later.
Code:
$config['db']['host'] = 'xxxxx';
$config['db']['port'] = 'xxxxx';
$config['db']['username'] = 'xxxxx';
$config['db']['password'] = 'xxxxx';
$config['db']['dbname'] = 'xxxxx';
 
 
$config['superAdmins'] = '1';
 
$config['cache']['enabled'] = true;
$config['cache']['frontend'] = 'Core';
$config['cache']['frontendOptions']['cache_id_prefix'] = 'xf_';
 
$config['cache']['backend'] = 'Memcached';
$config['cache']['backendOptions'] = array(
 'compression' => false,
 'servers' => array(
  array(
   // your memcached server IP /address
   'host' => 'localhost',
   
   // memcached port
   'port' => 11211,
  )
 )
);
Memcached is running on the server, Memcached stats returns the following:

Code:
127.0.0.1:11211  Field      Value
        accepting_conns          1
              auth_cmds          0
            auth_errors          0
                  bytes          0
              bytes_read          40
          bytes_written        819
              cas_badval          0
                cas_hits          0
              cas_misses          0
              cmd_flush          0
                cmd_get          0
                cmd_set          0
            conn_yields          0
  connection_structures          6
        curr_connections          5
              curr_items          0
              decr_hits          0
            decr_misses          0
            delete_hits          0
          delete_misses          0
              evictions          0
                get_hits          0
              get_misses          0
              incr_hits          0
            incr_misses          0
          limit_maxbytes    67108864
    listen_disabled_num          0
                    pid        5458
            pointer_size          64
          rusage_system    0.160010
            rusage_user    0.244015
                threads          4
                    time  1341136972
      total_connections          8
            total_items          0
                  uptime      30049
                version      1.4.4
What am I doing wrong please??
 

CTXMedia

Formerly CyclingTribe
#2
Yours looks different to mine, especially 'frontendOptions' - here's mine so you can compare (maybe copy the one below, adjust for your own preferences and give it a try?):

PHP:
$config['cache']['enabled'] = true;
$config['cache']['frontend'] = 'Core';
$config['cache']['frontendOptions'] = array('caching'  =>  true,
                                            'automatic_serialization' => true,
                                            'lifetime'    => 1800,
                                            'cache_id_prefix'  =>  'xf_'
);
$config['cache']['backend'] = 'Memcached';
$config['cache']['backendOptions'] = array(
            'servers' =>array(
                            array(
                                'host' => '127.0.0.1', // your memcached server ip /address
                                'port' => 11211        // memcached port
                            )
                        ),
            'compression' => false
);
Cheers,
Shaun :D
 

OldCoals

Active member
#4
Yours looks different to mine, especially 'frontendOptions' - here's mine so you can compare (maybe copy the one below, adjust for your own preferences and give it a try?):

PHP:
$config['cache']['enabled'] = true;
$config['cache']['frontend'] = 'Core';
$config['cache']['frontendOptions'] = array('caching'  =>  true,
                                            'automatic_serialization' => true,
                                            'lifetime'    => 1800,
                                            'cache_id_prefix'  =>  'xf_'
);
$config['cache']['backend'] = 'Memcached';
$config['cache']['backendOptions'] = array(
            'servers' =>array(
                            array(
                                'host' => '127.0.0.1', // your memcached server ip /address
                                'port' => 11211        // memcached port
                            )
                        ),
            'compression' => false
);
Cheers,
Shaun :D
I still have the same error I am afraid.
 

OldCoals

Active member
#7
No, it isn't running.

php -m
[PHP Modules]
bcmath
bz2
calendar
Core
ctype
curl
date
dom
ereg
filter
ftp
gd
hash
iconv
imap
json
libxml
mysql
mysqli
openssl
pcre
Phar
posix
Reflection
session
SimpleXML
sockets
SPL
SQLite
sqlite3
standard
suhosin
tokenizer
xml
xmlreader
xmlwriter
zlib

[Zend Modules]
Suhosin
i have just checked EasyApache and the Memcache option is ticked.
 

MattW

Well-known member
#8
No, it isn't running.


i have just checked EasyApache and the Memcache option is ticked.
Do you have the extension loaded in your php.ini file?

extension = "memcache.so"

or add it to the comma separated list in WHM.

I'm using CPANEL also:
Code:
php -m
[PHP Modules]
apc
bcmath
calendar
Core
ctype
curl
date
dom
ereg
filter
ftp
gd
hash
iconv
imap
json
libxml
memcache
mysql
mysqli
pcre
Phar
posix
Reflection
session
SimpleXML
sockets
SPL
SQLite
standard
timezonedb
tokenizer
xml
xmlreader
xmlwriter
zlib
 

MattW

Well-known member
#11
memcache itself will be running, but the part required to get php to talk to the memcache server appears to be missing.
 

MattW

Well-known member
#12
Also, if yum doesn't work installing php-pecl memcache, I documented my manual installation:

Code:
cd ~/memcache
wget http://pecl.php.net/get/memcache-3.0.6.tgz
tar xvfz memcache-3.0.6.tgz
cd memcache-3.0.6
phpize
./configure
make
make install
vim /usr/local/lib/php.ini
#Add this 
extension=memcache.so
 

craigiri

Well-known member
#15
Help another newbie along here....

I installed as per the yum, but could not locate or start, so I did it manually.

That worked - I added the line to the php.ini, restarted apache and now it shows up in the php -m

BUT, I cannot connect to it via telnet, nor with the memcache admin tool (php based) distributed by goog.

ps aux | grep memcached
root 13179 0.0 0.0 61216 768 pts/1 S+ 14:32 0:00 grep memcached

It looks like it has not bound to a port/IP...????

I have not tried to use it in XF as I want to make sure it's installed and running properly first!
 

MattW

Well-known member
#16
I don't think your memcached is running. All your grep has found is the grep itself.

Have you only installed the pecl memcache, or the full memcached package?
 

MattW

Well-known member
#17
You should see something like this with ps -ef

Code:
[~]# ps -ef | grep memcache
nobody    2946     1  0 Jun16 ?        00:00:00 /usr/local/bin/memcached -u root -m 32 -p 11211 -u nobody -l 127.0.0.1
z22se    20753 20706  0 20:02 pts/0    00:00:00 grep memcache
 

craigiri

Well-known member
#18
Nah, I guess it's not running -
ps -ef | grep memcache
root 14029 7557 0 15:04 pts/1 00:00:00 grep memcache

Funny since it first didn't show up in the php -m and then when I installed via yum it gave off an error, but when I installed via your manual commands there was no error on httpd restart and the entire directory and programs are clearly "there".

So the current install is as per the manual commands above. I just tried to uncomment the TCP port in the memcache.ini in the startup script folder, but no difference.

My server is managed so I can get my admin to do - just that this thread gave me the faith to give it a shot!

PHP info shows the file was parsed and loaded and has info on it:
memcache supportenabled
Version 3.0.6
Revision $Revision: 310129 $


DirectiveLocal ValueMaster Value
memcache.allow_failover 1 1
memcache.chunk_size 32768 32768
memcache.compress_threshold 20000 20000
memcache.default_port 11211 11211
memcache.hash_function crc32 crc32
memcache.hash_strategy consistent consistent
memcache.lock_timeout 15 15
memcache.max_failover_attempts 20 20
memcache.protocol ascii ascii
memcache.redundancy 1 1
memcache.session_redundancy 2 2
 

MattW

Well-known member
#19
Memcached is a daemon that you need to start.

How did you installed memcached (and not memcache which my instructions are referring to)?
 

MattW

Well-known member
#20
These are my notes from installing memcached:

Make the source folder
Code:
mkdir ~/memcache
Compile and Install LibEvent
Memcache requires LibEvent
Code:
cd ~/memcache
wget http://www.monkey.org/~provos/libevent-1.4.9-stable.tar.gz
tar xvfz libevent-1.4.9-stable.tar.gz
cd libevent-1.4.9-stable
./configure; make; make install
Compile and Install Memcache
Code:
cd ~/memcache
wget http://www.danga.com/memcached/dist/memcached-1.2.6.tar.gz
tar xvfz memcached-1.2.6.tar.gz
cd memcached-1.2.6
./configure --with-lib-event=/usr/local/; make; make install
Starting Memcache
Code:
memcached
I got the following error
Code:
error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory
So you need to register LibEvent
Code:
vim /etc/ld.so.conf.d/libevent-i386.conf
 
#Add this
/usr/local/lib/
Then run:
Code:
# ldconfig
You should then be able to start memcached
Code:
# memcached
I got the following error
Code:
can't run as root without the -u switch
This is because you need to run memcached as a user

Code:
memcached -d -u nobody -m 1024 -l 127.0.0.1 -p 11211
This starts memcached as a daemon (-d) under user "nobody" (-u nobody) using 1GB of memory (-m 1024) listening on the loopback device (-l 127.0.0.1) on port 11211 (-p 11211). A quick check shows that we're up and listening for an application to store and retrieve information:

Code:
50183 ?? Ss 0:00.11 bin/memcached -d -u nobody -m 1024 -l 127.0.0.1 -p 11211 tcp4 0 0 localhost.11211 *.* LISTEN
Installing PHP Memcache
Code:
cd ~/memcache
wget http://pecl.php.net/get/memcache-3.0.3.tgz
tar xvfz memcache-3.0.3.tgz
cd memcache-3.0.3
phpize
./configure
make
make install
Then add the extension into the php.ini file
Code:
vim /usr/local/lib/php.ini
 
#Add this
extension=memcache.so
Then restart apache

Then start memcached as a daemon via script

Create the configuration file
Code:
touch /etc/memcached.conf
Then add the below
Code:
#Memory 1GB
-m 1024
# default port
-p 11211
# user to run daemon nobody/apache/www-data
-u nobody
# only listen locally
-l 127.0.0.1
Create the startups files
Code:
touch /etc/init.d/memcached
chmod +x /etc/init.d/memcached
Add the below:
Code:
#!/bin/bash
#
# memcached    This shell script takes care of starting and stopping
#              standalone memcached.
#
# chkconfig: - 80 12
# description: memcached is a high-performance, distributed memory
#              object caching system, generic in nature, but
#              intended for use in speeding up dynamic web
#              applications by alleviating database load.
# processname: memcached
# config: /etc/memcached.conf
# Source function library.
. /etc/rc.d/init.d/functions
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/local/bin/memcached
DAEMONBOOTSTRAP=/usr/local/bin/start-memcached
DAEMONCONF=/etc/memcached.conf
NAME=memcached
DESC=memcached
PIDFILE=/var/run/$NAME.pid
[ -x $DAEMON ] || exit 0
[ -x $DAEMONBOOTSTRAP ] || exit 0
RETVAL=0
start() {
echo -n $"Starting $DESC: "
daemon $DAEMONBOOTSTRAP $DAEMONCONF
RETVAL=$?
[ $RETVAL -eq 0 ] && touch $PIDFILE
echo
return $RETVAL
}
stop() {
echo -n $"Shutting down $DESC: "
killproc $NAME
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f $PIDFILE
return $RETVAL
}
# See how we were called.
case "$1" in
start)
  start
  ;;
stop)
  stop
  ;;
restart|reload)
  stop
  start
  RETVAL=$?
  ;;
status)
  status $prog
  RETVAL=$?
  ;;
*)
  echo $"Usage: $0 {start|stop|restart|status}"
  exit 1
esac
exit $RETVAL
Code:
touch /usr/local/bin/start-memcached
chmod +x  /usr/local/bin/start-memcached
Add the below:
Code:
#!/usr/bin/perl -w
# start-memcached
# 2003/2004 - Jay Bonci <jaybonci@debian.org>
# This script handles the parsing of the /etc/memcached.conf file
# and was originally created for the Debian distribution.
# Anyone may use this little script under the same terms as
# memcached itself.
use strict;
if ($> != 0 and $< != 0) {
print STDERR "Only root wants to run start-memcached.\n";
exit;
}
my $etcfile = shift || "/etc/memcached.conf";
my $params = [];
my $etchandle;
# This script assumes that memcached is located at /usr/bin/memcached, and
# that the pidfile is writable at /var/run/memcached.pid
my $memcached = "/usr/local/bin/memcached";
my $pidfile = "/var/run/memcached.pid";
# If we don't get a valid logfile parameter in the /etc/memcached.conf file,
# we'll just throw away all of our in-daemon output. We need to re-tie it so
# that non-bash shells will not hang on logout. Thanks to Michael Renner for
# the tip
my $fd_reopened = "/dev/null";
sub handle_logfile {
my ($logfile) = @_;
$fd_reopened = $logfile;
}
sub reopen_logfile {
my ($logfile) = @_;
open *STDERR, ">>$logfile";
open *STDOUT, ">>$logfile";
open *STDIN, ">>/dev/null";
$fd_reopened = $logfile;
}
# This is set up in place here to support other non -[a-z] directives
my $conf_directives = {
"logfile" => \&handle_logfile
};
if (open $etchandle, $etcfile) {
foreach my $line (<$etchandle>) {
  $line =~ s/\#.*//go;
  $line = join ' ', split ' ', $line;
  next unless $line;
  next if $line =~ /^\-[dh]/o;
  if ($line =~ /^[^\-]/o) {
  my ($directive, $arg) = $line =~ /^(.*?)\s+(.*)/;
  $conf_directives->{$directive}->($arg);
  next;
  }
  push @$params, $line;
}
}
unshift @$params, "-u root" unless (grep $_ eq '-u', @$params);
$params = join " ", @$params;
if (-e $pidfile) {
open PIDHANDLE, "$pidfile";
my $localpid = <PIDHANDLE>;
close PIDHANDLE;
chomp $localpid;
if (-d "/proc/$localpid") {
  print STDERR "memcached is already running.\n";
  exit;
} else {
  `rm -f $localpid`;
}
}
my $pid = fork();
if ($pid == 0) {
reopen_logfile($fd_reopened);
exec "$memcached $params";
exit(0);
} elsif (open PIDHANDLE,">$pidfile") {
print PIDHANDLE $pid;
close PIDHANDLE;
} else {
print STDERR "Can't write pidfile to $pidfile.\n";
}
test the scripts
Code:
# /etc/init.d/memcached restart
Shutting down memcached:                                  [  OK  ]
Starting memcached:                                        [  OK  ]
Review to make sure the config file was parsed OK
Code:
# ps aux  | grep memcached
nobody    5966  0.5  0.3 18248 16444 pts/0  S    13:55  0:00 /usr/local/bin/memcached -u root -m 16 -p 11211 -u nobody -l 127.0.0.1
Add memcached to autostart daemon
Code:
# /sbin/chkconfig memcached on
# /sbin/chkconfig --list | grep memcached
memcached      0:off  1:off  2:on    3:on    4:on    5:on    6:off