[转]redis安装及相关配置

作者: 落日流水 | 来源:发表于2018-03-20 19:30 被阅读0次

[转]redis安装及相关配置
Redis安装
linux redis 安装及基本配置
Redis安装+Python操作Redis
redis安装
Ubuntu Redis 集群
Swoole单例模式及依赖注入进行Redis底层类库封装
Ubuntu安装配置Redis
SpringBoot Redis缓存
SpringBoot整合Redis及Redis工具类

转自：https://www.zybuluo.com/coldxiangyu/note/705140

redis官方运行环境为Linux，由于本地资源所限，采用windows系统。

windows安装配置redis十分简单，windows版本redis下载地址如下：

官方网站：http://redis.io/

官方下载：http://redis.io/download

windows版：https://github.com/mythz/redis-windows

解压下载zip文件，发现目录下有几个exe可执行文件，其中redis-cli.exe、

redis-server.exe分别为客户端与服务端启动程序。

启动redis服务端，如下：


D:\redis\redis-64.3.0.503>redis-server.exe
[6420] 29 Mar 09:27:14.755 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server.exe /path/to/redis.conf
                _._
           _.-``__ ''-._
      _.-``    `.  `_.  ''-._           Redis 3.0.503 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._
 (    '      ,       .-`  | `,    )     Running in standalone mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6379
 |    `-._   `._    /     _.-'    |     PID: 6420
  `-._    `-._  `-./  _.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |           http://redis.io
  `-._    `-._`-.__.-'_.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |
  `-._    `-._`-.__.-'_.-'    _.-'
      `-._    `-.__.-'    _.-'
          `-._        _.-'
              `-.__.-'
[6420] 29 Mar 09:27:14.772 # Server started, Redis version 3.0.503
[6420] 29 Mar 09:27:14.773 * The server is now ready to accept connections on port 6379

cmd命令窗口cd至redis安装目录，执行redis-server.exe (redis.conf) 其中redis.conf为redis核心配置，加上的话按该配置运行，不加则以redis默认配置运行，我用的版本redis-64.3.0.503，该配置文件名为redis.windows.conf

启动redis服务器后，另起一个cmd窗口启动客户端，

执行redis-cli.exe -h 127.0.0.1 -p 6379 连接redis服务器

测试如下：


127.0.0.1:6379> set code test

OK

127.0.0.1:6379> get code

"test"

127.0.0.1:6379>

测试成功！

以下为redis.conf相关配置说明：


# Redis configuration file example

# Note on units: when memory size is needed, it is possible to specifiy 

# it in the usual form of 1k 5GB 4M and so forth: 

# 

# 1k => 1000 bytes 

# 1kb => 1024 bytes 

# 1m => 1000000 bytes 

# 1mb => 1024*1024 bytes 

# 1g => 1000000000 bytes 

# 1gb => 1024*1024*1024 bytes 

# 

# units are case insensitive so 1GB 1Gb 1gB are all the same. 

# By default Redis does not run as a daemon. Use 'yes' if you need it. 

# Note that Redis will write a pid file in /var/run/redis.pid when daemonized. 

daemonize no   

Redis默认不是以守护进程的方式运行，可以通过该配置项修改，使用yes启用守护进程 

# When running daemonized, Redis writes a pid file in /var/run/redis.pid by 

# default. You can specify a custom pid file location here. 

pidfile /var/run/redis.pid 

当Redis以守护进程方式运行时，Redis默认会把pid写入/var/run/redis.pid文件，可以通过pidfile指定 

# Accept connections on the specified port, default is 6379. 

# If port 0 is specified Redis will not listen on a TCP socket. 

port 6379 

指定Redis监听端口，默认端口为6379 

# If you want you can bind a single interface, if the bind option is not 

# specified all the interfaces will listen for incoming connections. 

# 

# bind 127.0.0.1 

绑定的主机地址 

# Specify the path for the unix socket that will be used to listen for 

# incoming connections. There is no default, so Redis will not listen 

# on a unix socket when not specified. 

# 

# unixsocket /tmp/redis.sock 

# unixsocketperm 755 

# Close the connection after a client is idle for N seconds (0 to disable) 

timeout 0 

当 客户端闲置多长时间后关闭连接，如果指定为0，表示关闭该功能 

# Set server verbosity to 'debug' 

# it can be one of: 

# debug (a lot of information, useful for development/testing) 

# verbose (many rarely useful info, but not a mess like the debug level) 

# notice (moderately verbose, what you want in production probably) 

# warning (only very important / critical messages are logged) 

loglevel verbose 

指定日志记录级别，Redis总共支持四个级别：debug、verbose、notice、warning，默认为verbose 

# Specify the log file name. Also 'stdout' can be used to force 

# Redis to log on the standard output. Note that if you use standard 

# output for logging but daemonize, logs will be sent to /dev/null 

logfile stdout 

日志记录方式，默认为标准输出，如果配置Redis为守护进程方式运行，而这里又配置为日志记录方式为标准输出，则日志将会发送给/dev/null 

# To enable logging to the system logger, just set 'syslog-enabled' to yes, 

# and optionally update the other syslog parameters to suit your needs. 

# syslog-enabled no 

# Specify the syslog identity. 

# syslog-ident redis 

# Specify the syslog facility.  Must be USER or between LOCAL0-LOCAL7. 

# syslog-facility local0 

# Set the number of databases. The default database is DB 0, you can select 

# a different one on a per-connection basis using SELECT where 

# dbid is a number between 0 and 'databases'-1 

databases 16 

设置数据库的数量，默认数据库为0，可以使用SELECT 命令在连接上指定数据库id 

################################ SNAPSHOTTING  ################################# 

# 

# Save the DB on disk: 

# 

#  save  

# 

#  Will save the DB if both the given number of seconds and the given 

#  number of write operations against the DB occurred. 

# 

#  In the example below the behaviour will be to save: 

#  after 900 sec (15 min) if at least 1 key changed 

#  after 300 sec (5 min) if at least 10 keys changed 

#  after 60 sec if at least 10000 keys changed 

# 

#  Note: you can disable saving at all commenting all the "save" lines. 

save 900 1 

save 300 10 

save 60 10000 

分别表示900秒（15分钟）内有1个更改，300秒（5分钟）内有10个更改以及60秒内有10000个更改。 

指定在多长时间内，有多少次更新操作，就将数据同步到数据文件，可以多个条件配合 

# Compress string objects using LZF when dump .rdb databases? 

# For default that's set to 'yes' as it's almost always a win. 

# If you want to save some CPU in the saving child set it to 'no' but 

# the dataset will likely be bigger if you have compressible values or keys. 

rdbcompression yes 

指定存储至本地数据库时是否压缩数据，默认为yes，Redis采用LZF压缩，如果为了节省CPU时间，可以关闭该选项，但会导致数据库文件变的巨大 

# The filename where to dump the DB 

dbfilename dump.rdb 

指定本地数据库文件名，默认值为dump.rdb 

# The working directory. 

# 

# The DB will be written inside this directory, with the filename specified 

# above using the 'dbfilename' configuration directive. 

# 

# Also the Append Only File will be created inside this directory. 

# 

# Note that you must specify a directory here, not a file name. 

dir ./ 

指定本地数据库存放目录 

################################# REPLICATION ################################# 

# Master-Slave replication. Use slaveof to make a Redis instance a copy of 

# another Redis server. Note that the configuration is local to the slave 

# so for example it is possible to configure the slave to save the DB with a 

# different interval, or to listen to another port, and so on. 

# 

# slaveof  

slaveof 设置当本机为slav服务时，设置master服务的IP地址及端口，在Redis启动时，它会自动从master进行数据同步 

# If the master is password protected (using the "requirepass" configuration 

# directive below) it is possible to tell the slave to authenticate before 

# starting the replication synchronization process, otherwise the master will 

# refuse the slave request. 

# 

# masterauth  

masterauth 当master服务设置了密码保护时，slav服务连接master的密码 

# When a slave lost the connection with the master, or when the replication 

# is still in progress, the slave can act in two different ways: 

# 

# 1) if slave-serve-stale-data is set to 'yes' (the default) the slave will 

#    still reply to client requests, possibly with out of data data, or the 

#    data set may just be empty if this is the first synchronization. 

# 

# 2) if slave-serve-stale data is set to 'no' the slave will reply with 

#    an error "SYNC with master in progress" to all the kind of commands 

#    but to INFO and SLAVEOF. 

# 

slave-serve-stale-data yes 

# Slaves send PINGs to server in a predefined interval. It's possible to change 

# this interval with the repl_ping_slave_period option. The default value is 10 

# seconds. 

# 

# repl-ping-slave-period 10 

# The following option sets a timeout for both Bulk transfer I/O timeout and 

# master data or ping response timeout. The default value is 60 seconds. 

# 

# It is important to make sure that this value is greater than the value 

# specified for repl-ping-slave-period otherwise a timeout will be detected 

# every time there is low traffic between the master and the slave. 

# 

# repl-timeout 60 

################################## SECURITY ################################### 

# Require clients to issue AUTH before processing any other 

# commands.  This might be useful in environments in which you do not trust 

# others with access to the host running redis-server. 

# 

# This should stay commented out for backward compatibility and because most 

# people do not need auth (e.g. they run their own servers). 

# 

# Warning: since Redis is pretty fast an outside user can try up to 

# 150k passwords per second against a good box. This means that you should 

# use a very strong password otherwise it will be very easy to break. 

# 

# requirepass foobared 

requirepass foobared 设置Redis连接密码，如果配置了连接密码，客户端在连接Redis时需要通过AUTH 命令提供密码，默认关闭 

# Command renaming. 

# 

# It is possilbe to change the name of dangerous commands in a shared 

# environment. For instance the CONFIG command may be renamed into something 

# of hard to guess so that it will be still available for internal-use 

# tools but not available for general clients. 

# 

# Example: 

# 

# rename-command CONFIG b840fc02d524045429941cc15f59e41cb7be6c52 

# 

# It is also possilbe to completely kill a command renaming it into 

# an empty string: 

# 

# rename-command CONFIG "" 

################################### LIMITS #################################### 

# Set the max number of connected clients at the same time. By default there 

# is no limit, and it's up to the number of file descriptors the Redis process 

# is able to open. The special value '0' means no limits. 

# Once the limit is reached Redis will close all the new connections sending 

# an error 'max number of clients reached'. 

# 

# maxclients 128 

maxclients 128 设置同一时间最大客户端连接数，默认无限制，Redis可以同时打开的客户端连接数为Redis进程可以打开的最大文件描述符数，如果设置 maxclients 0，表示不作限制。当客户端连接数到达限制时，Redis会关闭新的连接并向客户端返回max number of clients reached错误信息 

# Don't use more memory than the specified amount of bytes. 

# When the memory limit is reached Redis will try to remove keys with an 

# EXPIRE set. It will try to start freeing keys that are going to expire 

# in little time and preserve keys with a longer time to live. 

# Redis will also try to remove objects from free lists if possible. 

# 

# If all this fails, Redis will start to reply with errors to commands 

# that will use more memory, like SET, LPUSH, and so on, and will continue 

# to reply to most read-only commands like GET. 

# 

# WARNING: maxmemory can be a good idea mainly if you want to use Redis as a 

# 'state' server or cache, not as a real DB. When Redis is used as a real 

# database the memory usage will grow over the weeks, it will be obvious if 

# it is going to use too much memory in the long run, and you'll have the time 

# to upgrade. With maxmemory after the limit is reached you'll start to get 

# errors for write operations, and this may even lead to DB inconsistency. 

# 

# maxmemory  

maxmemory 指定Redis最大内存限制，Redis在启动时会把数据加载到内存中，达到最大内存后，Redis会先尝试清除已到期或即将到期的Key，当此方法处理 后，仍然到达最大内存设置，将无法再进行写入操作，但仍然可以进行读取操作。Redis新的vm机制，会把Key存放内存，Value会存放在swap区 

# MAXMEMORY POLICY: how Redis will select what to remove when maxmemory 

# is reached? You can select among five behavior: 

# 

# volatile-lru -> remove the key with an expire set using an LRU algorithm 

# allkeys-lru -> remove any key accordingly to the LRU algorithm 

# volatile-random -> remove a random key with an expire set 

# allkeys->random -> remove a random key, any key 

# volatile-ttl -> remove the key with the nearest expire time (minor TTL) 

# noeviction -> don't expire at all, just return an error on write operations 

# 

# Note: with all the kind of policies, Redis will return an error on write 

#      operations, when there are not suitable keys for eviction. 

# 

#      At the date of writing this commands are: set setnx setex append 

#      incr decr rpush lpush rpushx lpushx linsert lset rpoplpush sadd 

#      sinter sinterstore sunion sunionstore sdiff sdiffstore zadd zincrby 

#      zunionstore zinterstore hset hsetnx hmset hincrby incrby decrby 

#      getset mset msetnx exec sort 

# 

# The default is: 

# 

# maxmemory-policy volatile-lru 

# LRU and minimal TTL algorithms are not precise algorithms but approximated 

# algorithms (in order to save memory), so you can select as well the sample 

# size to check. For instance for default Redis will check three keys and 

# pick the one that was used less recently, you can change the sample size 

# using the following configuration directive. 

# 

# maxmemory-samples 3 

############################## APPEND ONLY MODE ############################### 

# By default Redis asynchronously dumps the dataset on disk. If you can live 

# with the idea that the latest records will be lost if something like a crash 

# happens this is the preferred way to run Redis. If instead you care a lot 

# about your data and don't want to that a single record can get lost you should 

# enable the append only mode: when this mode is enabled Redis will append 

# every write operation received in the file appendonly.aof. This file will 

# be read on startup in order to rebuild the full dataset in memory. 

# 

# Note that you can have both the async dumps and the append only file if you 

# like (you have to comment the "save" statements above to disable the dumps). 

# Still if append only mode is enabled Redis will load the data from the 

# log file at startup ignoring the dump.rdb file. 

# 

# IMPORTANT: Check the BGREWRITEAOF to check how to rewrite the append 

# log file in background when it gets too big. 

appendonly no 

appendonly no指定是否在每次更新操作后进行日志记录，Redis在默认情况下是异步的把数据写入磁盘，如果不开启，可能会在断电时导致一段时间内的数据丢失。因为 redis本身同步数据文件是按上面save条件来同步的，所以有的数据会在一段时间内只存在于内存中。默认为no 

# The name of the append only file (default: "appendonly.aof") 

# appendfilename appendonly.aof 

appendfilename appendonly.aof指定更新日志文件名，默认为appendonly.aof 

# The fsync() call tells the Operating System to actually write data on disk 

# instead to wait for more data in the output buffer. Some OS will really flush 

# data on disk, some other OS will just try to do it ASAP. 

# 

# Redis supports three different modes: 

# 

# no: don't fsync, just let the OS flush the data when it wants. Faster. 

# always: fsync after every write to the append only log . Slow, Safest. 

# everysec: fsync only if one second passed since the last fsync. Compromise. 

# 

# The default is "everysec" that's usually the right compromise between 

# speed and data safety. It's up to you to understand if you can relax this to 

# "no" that will will let the operating system flush the output buffer when 

# it wants, for better performances (but if you can live with the idea of 

# some data loss consider the default persistence mode that's snapshotting), 

# or on the contrary, use "always" that's very slow but a bit safer than 

# everysec. 

# 

# If unsure, use "everysec". 

# appendfsync always 

appendfsync everysec 

# appendfsync no 

指定更新日志条件，共有3个可选值： 

no：表示等操作系统进行数据缓存同步到磁盘（快） 

always：表示每次更新操作后手动调用fsync()将数据写到磁盘（慢，安全） 

everysec：表示每秒同步一次（折衷，默认值） 

# When the AOF fsync policy is set to always or everysec, and a background 

# saving process (a background save or AOF log background rewriting) is 

# performing a lot of I/O against the disk, in some Linux configurations 

# Redis may block too long on the fsync() call. Note that there is no fix for 

# this currently, as even performing fsync in a different thread will block 

# our synchronous write(2) call. 

# 

# In order to mitigate this problem it's possible to use the following option 

# that will prevent fsync() from being called in the main process while a 

# BGSAVE or BGREWRITEAOF is in progress. 

# 

# This means that while another child is saving the durability of Redis is 

# the same as "appendfsync none", that in pratical terms means that it is 

# possible to lost up to 30 seconds of log in the worst scenario (with the 

# default Linux settings). 

# 

# If you have latency problems turn this to "yes". Otherwise leave it as 

# "no" that is the safest pick from the point of view of durability. 

no-appendfsync-on-rewrite no 

# Automatic rewrite of the append only file. 

# Redis is able to automatically rewrite the log file implicitly calling 

# BGREWRITEAOF when the AOF log size will growth by the specified percentage. 

# 

# This is how it works: Redis remembers the size of the AOF file after the 

# latest rewrite (or if no rewrite happened since the restart, the size of 

# the AOF at startup is used). 

# 

# This base size is compared to the current size. If the current size is 

# bigger than the specified percentage, the rewrite is triggered. Also 

# you need to specify a minimal size for the AOF file to be rewritten, this 

# is useful to avoid rewriting the AOF file even if the percentage increase 

# is reached but it is still pretty small. 

# 

# Specify a precentage of zero in order to disable the automatic AOF 

# rewrite feature. 

auto-aof-rewrite-percentage 100 

auto-aof-rewrite-min-size 64mb 

################################## SLOW LOG ################################### 

# The Redis Slow Log is a system to log queries that exceeded a specified 

# execution time. The execution time does not include the I/O operations 

# like talking with the client, sending the reply and so forth, 

# but just the time needed to actually execute the command (this is the only 

# stage of command execution where the thread is blocked and can not serve 

# other requests in the meantime). 

# 

# You can configure the slow log with two parameters: one tells Redis 

# what is the execution time, in microseconds, to exceed in order for the 

# command to get logged, and the other parameter is the length of the 

# slow log. When a new command is logged the oldest one is removed from the 

# queue of logged commands. 

# The following time is expressed in microseconds, so 1000000 is equivalent 

# to one second. Note that a negative number disables the slow log, while 

# a value of zero forces the logging of every command. 

slowlog-log-slower-than 10000 

# There is no limit to this length. Just be aware that it will consume memory. 

# You can reclaim memory used by the slow log with SLOWLOG RESET. 

slowlog-max-len 1024 

################################ VIRTUAL MEMORY ############################### 

### WARNING! Virtual Memory is deprecated in Redis 2.4 

### The use of Virtual Memory is strongly discouraged. 

### WARNING! Virtual Memory is deprecated in Redis 2.4 

### The use of Virtual Memory is strongly discouraged. 

# Virtual Memory allows Redis to work with datasets bigger than the actual 

# amount of RAM needed to hold the whole dataset in memory. 

# In order to do so very used keys are taken in memory while the other keys 

# are swapped into a swap file, similarly to what operating systems do 

# with memory pages. 

# 

# To enable VM just set 'vm-enabled' to yes, and set the following three 

# VM parameters accordingly to your needs. 

vm-enabled no 

指定是否启用虚拟内存机制，默认值为no，简单的介绍一下，VM机制将数据分页存放，由Redis将访问量较少的页即冷数据swap到磁盘上，访问多的页面由磁盘自动换出到内存中（在后面的文章我会仔细分析Redis的VM机制） 

# vm-enabled yes 

# This is the path of the Redis swap file. As you can guess, swap files 

# can't be shared by different Redis instances, so make sure to use a swap 

# file for every redis process you are running. Redis will complain if the 

# swap file is already in use. 

# 

# The best kind of storage for the Redis swap file (that's accessed at random) 

# is a Solid State Disk (SSD). 

# 

# *** WARNING *** if you are using a shared hosting the default of putting 

# the swap file under /tmp is not secure. Create a dir with access granted 

# only to Redis user and configure Redis to create the swap file there. 

vm-swap-file /tmp/redis.swap 

虚拟内存文件路径，默认值为/tmp/redis.swap，不可多个Redis实例共享 

# vm-max-memory configures the VM to use at max the specified amount of 

# RAM. Everything that deos not fit will be swapped on disk *if* possible, that 

# is, if there is still enough contiguous space in the swap file. 

# 

# With vm-max-memory 0 the system will swap everything it can. Not a good 

# default, just specify the max amount of RAM you can in bytes, but it's 

# better to leave some margin. For instance specify an amount of RAM 

# that's more or less between 60 and 80% of your free RAM. 

vm-max-memory 0 

将所有大于vm-max-memory的数据存入虚拟内存,无论vm-max-memory设置多小,所有索引数据都是内存存储的(Redis的索引数据 就是keys),也就是说,当vm-max-memory设置为0的时候,其实是所有value都存在于磁盘。默认值为0 

# Redis swap files is split into pages. An object can be saved using multiple 

# contiguous pages, but pages can't be shared between different objects. 

# So if your page is too big, small objects swapped out on disk will waste 

# a lot of space. If you page is too small, there is less space in the swap 

# file (assuming you configured the same number of total swap file pages). 

# 

# If you use a lot of small objects, use a page size of 64 or 32 bytes. 

# If you use a lot of big objects, use a bigger page size. 

# If unsure, use the default :) 

vm-page-size 32 

Redis swap文件分成了很多的page，一个对象可以保存在多个page上面，但一个page上不能被多个对象共享，vm-page-size是要根据存储的 数据大小来设定的，作者建议如果存储很多小对象，page大小最好设置为32或者64bytes；如果存储很大大对象，则可以使用更大的page，如果不 确定，就使用默认值 

# Number of total memory pages in the swap file. 

# Given that the page table (a bitmap of free/used pages) is taken in memory, 

# every 8 pages on disk will consume 1 byte of RAM. 

# 

# The total swap size is vm-page-size * vm-pages 

# 

# With the default of 32-bytes memory pages and 134217728 pages Redis will 

# use a 4 GB swap file, that will use 16 MB of RAM for the page table. 

# 

# It's better to use the smallest acceptable value for your application, 

# but the default is large in order to work in most conditions. 

vm-pages 134217728 

设置swap文件中的page数量，由于页表（一种表示页面空闲或使用的bitmap）是在放在内存中的，，在磁盘上每8个pages将消耗1byte的内存。 

# Max number of VM I/O threads running at the same time. 

# This threads are used to read/write data from/to swap file, since they 

# also encode and decode objects from disk to memory or the reverse, a bigger 

# number of threads can help with big objects even if they can't help with 

# I/O itself as the physical device may not be able to couple with many 

# reads/writes operations at the same time. 

# 

# The special value of 0 turn off threaded I/O and enables the blocking 

# Virtual Memory implementation. 

vm-max-threads 4 

设置访问swap文件的线程数,最好不要超过机器的核数,如果设置为0,那么所有对swap文件的操作都是串行的，可能会造成比较长时间的延迟。默认值为4 

############################### ADVANCED CONFIG ############################### 

# Hashes are encoded in a special way (much more memory efficient) when they 

# have at max a given numer of elements, and the biggest element does not 

# exceed a given threshold. You can configure this limits with the following 

# configuration directives. 

hash-max-zipmap-entries 512 

hash-max-zipmap-value 64 

指定在超过一定的数量或者最大的元素超过某一临界值时，采用一种特殊的哈希算法 

# Similarly to hashes, small lists are also encoded in a special way in order 

# to save a lot of space. The special representation is only used when 

# you are under the following limits: 

list-max-ziplist-entries 512 

list-max-ziplist-value 64 

# Sets have a special encoding in just one case: when a set is composed 

# of just strings that happens to be integers in radix 10 in the range 

# of 64 bit signed integers. 

# The following configuration setting sets the limit in the size of the 

# set in order to use this special memory saving encoding. 

set-max-intset-entries 512 

# Similarly to hashes and lists, sorted sets are also specially encoded in 

# order to save a lot of space. This encoding is only used when the length and 

# elements of a sorted set are below the following limits: 

zset-max-ziplist-entries 128 

zset-max-ziplist-value 64 

# Active rehashing uses 1 millisecond every 100 milliseconds of CPU time in 

# order to help rehashing the main Redis hash table (the one mapping top-level 

# keys to values). The hash table implementation redis uses (see dict.c) 

# performs a lazy rehashing: the more operation you run into an hash table 

# that is rhashing, the more rehashing "steps" are performed, so if the 

# server is idle the rehashing is never complete and some more memory is used 

# by the hash table. 

# 

# The default is to use this millisecond 10 times every second in order to 

# active rehashing the main dictionaries, freeing memory when possible. 

# 

# If unsure: 

# use "activerehashing no" if you have hard latency requirements and it is 

# not a good thing in your environment that Redis can reply form time to time 

# to queries with 2 milliseconds delay. 

# 

# use "activerehashing yes" if you don't have such hard requirements but 

# want to free memory asap when possible. 

activerehashing yes 

################################## INCLUDES ################################### 

# Include one or more other config files here.  This is useful if you 

# have a standard template that goes to all redis server but also need 

# to customize a few per-server settings.  Include files can include 

# other files, so use this wisely. 

# 

# include /path/to/local.conf 

# include /path/to/other.conf

原文：https://www.zybuluo.com/coldxiangyu/note/705140