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HomeBackend DevelopmentPHP TutorialA brief analysis of memcache startup and detailed explanation of telnet commands_PHP tutorial

A brief analysis of memcache startup and detailed explanation of telnet commands_PHP tutorial

Jul 21, 2016 pm 03:02 PM
memcachetelnetcodeparameterstart upOrdercopyCommonly usedDetailed explanation

1、启动Memcache 常用参数

复制代码 代码如下:

-p 监听的TCP端口(默认: 11211)
-U UDP监听端口 (默认: 11211, 0 时关闭)
-d 以守护进程方式运行
-u 运行运行 Memcached的账户 非root用户
-m 最大的内存使用单位是MB 默认是64MB
-c 软连接数量默认是1024
-v 输出警告和错误信息
-vv 打印客户端的请求和返回信息
-h 打印帮助信息
-i 打印memcached和libevent的版权信息
-l 绑定地址 (默认:所有都允许,无论内外网或者本机更换IP,有安全隐患,若设置为127.0.0.1就只能本机访问)
-P 将PID写入文件,这样可以使得后边进行快速进程终止, 需要与 -d 一起使用

2、Memcache telnet 常用命令
COMMAND DESCRIPTION EXAMPLE
get Reads a value get mykey
set Set a key unconditionally set mykey 0 60 5
add Add a new key add newkey 0 60 5
replace Overwrite existing key replace key 0 60 5
append Append data to existing key append key 0 60 15
prepend Prepend data to existing key prepend key 0 60 15
incr Increments numerical key value by given number incr mykey 2
decr Decrements numerical key value by given number decr mykey 5
delete Deletes an existing key delete mykey
flush_all Invalidate specific items immediately flush_all
Invalidate all items in n seconds flush_all 900
stats Prints general statistics stats
Prints memory statistics stats slabs
Prints memory statistics stats malloc
Print higher level allocation statistics stats items
  stats detail
  stats sizes
Resets statistics stats reset
version Prints server version. version
verbosity Increases log level verbosity
quit Terminate telnet session quit

3、stats命令详解
pid memcache服务器的进程ID
uptime 服务器已经运行的秒数
time 服务器当前的unix时间戳
version memcache版本
pointer_size 当前操作系统的指针大小(32位系统一般是32bit)
rusage_user 进程的累计用户时间
rusage_system 进程的累计系统时间
curr_items 服务器当前存储的items数量
total_items 从服务器启动以后存储的items总数量
bytes 当前服务器存储items占用的字节数
curr_connections 当前打开着的连接数
total_connections 从服务器启动以后曾经打开过的连接数
connection_structures 服务器分配的连接构造数
cmd_get get命令(获取)总请求次数
cmd_set set命令(保存)总请求次数
get_hits 总命中次数
get_misses 总未命中次数
evictions 为获取空闲内存而删除的items数(分配给memcache的空间用满后需要删除旧的items来得到空间分配给新的items)
bytes_read 总读取字节数(请求字节数)
bytes_written 总发送字节数(结果字节数)
limit_maxbytes 分配给memcache的内存大小(字节)
threads 当前线程数

4. Memcache startup tips
a: Monitor the intranet address
b: Modify the default port number
c: Set the maximum number of connections and maximum memory usage

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/327938.htmlTechArticle1. Start Memcache. Common parameters to copy the code are as follows: -p num listening TCP port (default: 11211) - U num UDP listening port (default: 11211, closed at 0) -d Run as daemon...
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