我有一个基于Memcached变量的聊天引擎,将它们放入数组并通过jquery读取它们的另一端,
可以在95%的时间内正常运行,但是,当服务器负载很高时,memcached(假定其为memcached)崩溃会导致浏览器卡住。
我不认为它的jquery问题,因为这仅在服务器负载很高时才会发生。
我需要一种方法来监视内存缓存的服务器或以某种方式将日志文件写入失败/错误发生的位置...
关于我该怎么做的任何想法?或任何知道为何memcached服务器发生故障?我按如下方式运行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
- 1个PORT =“ 11211” USER =“ memcached” MAXCONN =“ 20480” CACHESIZE =“ 4096” OPTIONS =“” – user1179459 2012年 8月29日8:55
首先,您没有显示memcached配置,而是显示了启动脚本。您需要寻找一个名为like的文件/etc/memcached.conf
。要启用日志记录,您需要取消注释该行
logfile /var/log/memcached.log
另外,您可以通过启用-v
或-vv
选项来增加详细程度。
如果memcached崩溃了,您可以查看系统日志/var/log/messages
并/var/log/syslog
检查可能的错误情况。
- 我在我的系统中没有名为memcached.conf的文件,仅拥有一个名为.. / etc / sysconfig / memcached的文件。PORT =“ 11211” USER =“ memcached” MAXCONN =“ 20480” CACHESIZE =“ 4096” OPTIONS =“” – user1179459 2012年 8月29日8:56
- 1个在这种情况下,如我的情况一样,配置位于init脚本本身中。从源安装memcached时,这就是memcached.sysv初始化脚本的发送方式。 – emhohensee 16年 1月25日在20:38
在中定义一个附加变量/etc/sysconfig/memcached
:
PORT="11211"
USER="memcached"
MAXCONN="1024"
CACHESIZE="64"
LOGFILE="/var/log/memcached.log"
OPTIONS=""
start()
在初始化脚本中编辑函数,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
}
然后重新启动memcached,您将在看到以下内容/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)
不要忘记配置logrotate。