Memcached 調試/伺服器日誌監控 Memcached 伺服器？

我有基於 Memcached 變數的聊天引擎，將它們放入數組並通過 jquery 在另一端讀取它們，

這在 95% 的情況下都可以正常工作，但是當伺服器負載很高的 memcached（假設它是 memcached）時，崩潰和瀏覽器就會卡住。

我不認為它的 jquery 問題，因為這僅在伺服器負載非常高時發生。

我需要一種方法來監視 memcached 伺服器或以某種方式將日誌文件寫入失敗/錯誤出現的位置…

關於我如何做到這一點的任何想法？或者知道為什麼 memcached 伺服器會失敗？我按如下方式執行 memcached

$GLOBALS['MemCached'] = FALSE;
$GLOBALS['MemCached'] = new Memcache;
$GLOBALS['MemCached']->pconnect('localhost', 11211);

我的 memcached 配置如下

#! /bin/sh
#
# chkconfig: - 55 45
# description:  The memcached daemon is a network memory cache service.
# processname: memcached
# config: /etc/sysconfig/memcached
# pidfile: /var/run/memcached/memcached.pid

# Standard LSB functions
#. /lib/lsb/init-functions

# Source function library.
. /etc/init.d/functions

PORT=11211
USER=memcached
MAXCONN=1024
CACHESIZE=128
OPTIONS=""

if [ -f /etc/sysconfig/memcached ];then 
   . /etc/sysconfig/memcached
fi

# Check that networking is up.
. /etc/sysconfig/network

if [ "$NETWORKING" = "no" ]
then
   exit 0
fi

RETVAL=0
prog="memcached"
pidfile=${PIDFILE-/var/run/memcached/memcached.pid}
lockfile=${LOCKFILE-/var/lock/subsys/memcached}

start () {
   echo -n $"Starting $prog: "
   # Ensure that /var/run/memcached has proper permissions
   if [ "`stat -c %U /var/run/memcached`" != "$USER" ]; then
       chown $USER /var/run/memcached
   fi

   daemon --pidfile ${pidfile} memcached -d -p $PORT -u $USER  -m $CACHESIZE -c $MAXCONN -P ${pidfile} $OPTIONS
   RETVAL=$?
   echo
   [ $RETVAL -eq 0 ] && touch ${lockfile}
}
stop () {
   echo -n $"Stopping $prog: "
   killproc -p ${pidfile} /usr/bin/memcached
   RETVAL=$?
   echo
   if [ $RETVAL -eq 0 ] ; then
       rm -f ${lockfile} ${pidfile}
   fi
}

restart () {
       stop
       start
}


# See how we were called.
case "$1" in
 start)
   start
   ;;
 stop)
   stop
   ;;
 status)
   status -p ${pidfile} memcached
   RETVAL=$?
   ;;
 restart|reload|force-reload)
   restart
   ;;
 condrestart|try-restart)
   [ -f ${lockfile} ] && restart || :
   ;;
 *)
   echo $"Usage: $0 {start|stop|status|restart|reload|force-reload|condrestart|try-restart}"
   RETVAL=2
       ;;
esac

exit $RETVAL

在 中定義一個附加變數/etc/sysconfig/memcached：

PORT="11211"
USER="memcached"
MAXCONN="1024"
CACHESIZE="64"
LOGFILE="/var/log/memcached.log"
OPTIONS=""

編輯start()init 腳本中的函式，如下所示：

start () {
   #echo -n $"Starting $prog: "
   # insure that /var/run/memcached has proper permissions
   if [ "`stat -c %U /var/run/memcached`" != "$USER" ]; then
       chown $USER /var/run/memcached
   fi

   #daemon --pidfile /var/run/memcached/memcached.pid memcached -d -p $PORT -u $USER  -m $CACHESIZE -c $MAXCONN -P /var/run/memcached/memcached.pid $OPTIONS -vv > $LOGFILE 2>&1
   $prog -d -p $PORT -u $USER  -m $CACHESIZE -c $MAXCONN -P /var/run/memcached/memcached.pid $OPTIONS -vv > $LOGFILE 2>&1
   RETVAL=$?
   #echo
   [ $RETVAL -eq 0 ] && action $"Starting $prog: " /bin/true && touch /var/lock/subsys/memcached
}

然後重新啟動 memcached，你會在下面看到類似的內容/var/log/memcached.log：

slab class  40: chunk size    616944 perslab       1
slab class  41: chunk size    771184 perslab       1
slab class  42: chunk size   1048576 perslab       1
<26 server listening (auto-negotiate)
<27 server listening (auto-negotiate)
<28 send buffer was 129024, now 268435456
<29 send buffer was 129024, now 268435456
<28 server listening (udp)
<29 server listening (udp)

不要忘記配置 logrotate。

引用自：https://serverfault.com/questions/422350