• redis windows下的环境搭建


    先说下安装吧!感觉这东西跟mongodb差不多,安装和布置挺简单,


    下载地址:https://github.com/dmajkic/redis/downloads 下载下来的包里有两个,
    一个是32位的,一个是64位的。根据自己的实情情况选择,我的是32bit,
    把这个文件夹复制到其它地方,比如D: edis 目录下。
    打开一个cmd窗口  使用cd命令切换目录到d: edis  运行 redis-server.exe redis.conf  
    如果想方便的话,可以把redis的路径加到系统的环境变量里,这样就省得再输路径了,后面的那个redis.conf可以省略,如果省略,会启用默认的。输入之后,会显示如下界面:

     
    这时候别启一个cmd窗口,原来的不要关闭,不然就无法访问服务端了
    切换到redis目录下运行 redis-cli.exe -h 127.0.0.1 -p 6379 出现下图:

     
    这时候,就已经完成配置了,现在说下它的的redis.conf配置文件。下面是相关项的说明,
     
    001
    # Redis configuration file example
    002
     
    003
    # Note on units: when memory size is needed, it is possible to specifiy
    004
    # it in the usual form of 1k 5GB 4M and so forth:
    005
    #
    006
    # 1k => 1000 bytes
    007
    # 1kb => 1024 bytes
    008
    # 1m => 1000000 bytes
    009
    # 1mb => 1024*1024 bytes
    010
    # 1g => 1000000000 bytes
    011
    # 1gb => 1024*1024*1024 bytes
    012
    #
    013
    # units are case insensitive so 1GB 1Gb 1gB are all the same.
    014
     
    015
    # By default Redis does not run as a daemon. Use 'yes' if you need it.
    016
    # Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
    017
    daemonize no 
    018
    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
    019
     
    020
    # When running daemonized, Redis writes a pid file in /var/run/redis.pid by
    021
    # default. You can specify a custom pid file location here.
    022
    pidfile /var/run/redis.pid
    023
    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
    024
    # Accept connections on the specified port, default is 6379.
    025
    # If port 0 is specified Redis will not listen on a TCP socket.
    026
    port 6379
    027
    指定Redis监听端口,默认端口为6379
    028
    # If you want you can bind a single interface, if the bind option is not
    029
    # specified all the interfaces will listen for incoming connections.
    030
    #
    031
    # bind 127.0.0.1
    032
    绑定的主机地址
    033
    # Specify the path for the unix socket that will be used to listen for
    034
    # incoming connections. There is no default, so Redis will not listen
    035
    # on a unix socket when not specified.  www.2cto.com  
    036
    #
    037
    # unixsocket /tmp/redis.sock
    038
    # unixsocketperm 755
    039
     
    040
    # Close the connection after a client is idle for N seconds (0 to disable)
    041
    timeout 0
    042
    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
    043
    # Set server verbosity to 'debug'
    044
    # it can be one of:
    045
    # debug (a lot of information, useful for development/testing)
    046
    # verbose (many rarely useful info, but not a mess like the debug level)
    047
    # notice (moderately verbose, what you want in production probably)
    048
    # warning (only very important / critical messages are logged)
    049
    loglevel verbose
    050
    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
    051
    # Specify the log file name. Also 'stdout' can be used to force
    052
    # Redis to log on the standard output. Note that if you use standard
    053
    # output for logging but daemonize, logs will be sent to /dev/null
    054
    logfile stdout
    055
    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
    056
    # To enable logging to the system logger, just set 'syslog-enabled' to yes,
    057
    # and optionally update the other syslog parameters to suit your needs.
    058
    # syslog-enabled no
    059
     
    060
    # Specify the syslog identity.
    061
    # syslog-ident redis
    062
     
    063
    # Specify the syslog facility.  Must be USER or between LOCAL0-LOCAL7.
    064
    # syslog-facility local0
    065
     
    066
    # Set the number of databases. The default database is DB 0, you can select
    067
    # a different one on a per-connection basis using SELECT <dbid> where
    068
    # dbid is a number between 0 and 'databases'-1
    069
    databases 16  www.2cto.com  
    070
    设置数据库的数量,默认数据库为0,可以使用SELECT <dbid>命令在连接上指定数据库id
    071
    ################################ SNAPSHOTTING  #################################
    072
    #
    073
    # Save the DB on disk:
    074
    #
    075
    #   save <seconds> <changes>
    076
    #
    077
    #   Will save the DB if both the given number of seconds and the given
    078
    #   number of write operations against the DB occurred.
    079
    #
    080
    #   In the example below the behaviour will be to save:
    081
    #   after 900 sec (15 min) if at least 1 key changed
    082
    #   after 300 sec (5 min) if at least 10 keys changed
    083
    #   after 60 sec if at least 10000 keys changed
    084
    #
    085
    #   Note: you can disable saving at all commenting all the "save" lines.
    086
     
    087
    save 900 1
    088
    save 300 10
    089
    save 60 10000
    090
    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。
    091
    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
    092
    # Compress string objects using LZF when dump .rdb databases?
    093
    # For default that's set to 'yes' as it's almost always a win.
    094
    # If you want to save some CPU in the saving child set it to 'no' but
    095
    # the dataset will likely be bigger if you have compressible values or keys.
    096
    rdbcompression yes
    097
    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
    098
    # The filename where to dump the DB
    099
    dbfilename dump.rdb
    100
    指定本地数据库文件名,默认值为dump.rdb
    101
    # The working directory.
    102
    #
    103
    # The DB will be written inside this directory, with the filename specified
    104
    # above using the 'dbfilename' configuration directive.
    105
    #
    106
    # Also the Append Only File will be created inside this directory.
    107
    #
    108
    # Note that you must specify a directory here, not a file name.
    109
    dir ./
    110
    指定本地数据库存放目录
    111
    ################################# REPLICATION #################################
    112
     
    113
    # Master-Slave replication. Use slaveof to make a Redis instance a copy of
    114
    # another Redis server. Note that the configuration is local to the slave
    115
    # so for example it is possible to configure the slave to save the DB with a
    116
    # different interval, or to listen to another port, and so on.  www.2cto.com  
    117
    #
    118
    # slaveof <masterip> <masterport>
    119
    slaveof <masterip> <masterport> 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
    120
    # If the master is password protected (using the "requirepass" configuration
    121
    # directive below) it is possible to tell the slave to authenticate before
    122
    # starting the replication synchronization process, otherwise the master will
    123
    # refuse the slave request.
    124
    #
    125
    # masterauth <master-password>
    126
    masterauth <master-password> 当master服务设置了密码保护时,slav服务连接master的密码
    127
    # When a slave lost the connection with the master, or when the replication
    128
    # is still in progress, the slave can act in two different ways:
    129
    #
    130
    # 1) if slave-serve-stale-data is set to 'yes' (the default) the slave will
    131
    #    still reply to client requests, possibly with out of data data, or the
    132
    #    data set may just be empty if this is the first synchronization.
    133
    #
    134
    # 2) if slave-serve-stale data is set to 'no' the slave will reply with
    135
    #    an error "SYNC with master in progress" to all the kind of commands
    136
    #    but to INFO and SLAVEOF.
    137
    #
    138
    slave-serve-stale-data yes
    139
     
    140
    # Slaves send PINGs to server in a predefined interval. It's possible to change
    141
    # this interval with the repl_ping_slave_period option. The default value is 10
    142
    # seconds.  www.2cto.com  
    143
    #
    144
    # repl-ping-slave-period 10
    145
     
    146
    # The following option sets a timeout for both Bulk transfer I/O timeout and
    147
    # master data or ping response timeout. The default value is 60 seconds.
    148
    #
    149
    # It is important to make sure that this value is greater than the value
    150
    # specified for repl-ping-slave-period otherwise a timeout will be detected
    151
    # every time there is low traffic between the master and the slave.
    152
    #
    153
    # repl-timeout 60
    154
     
    155
    ################################## SECURITY ###################################
    156
     
    157
    # Require clients to issue AUTH <PASSWORD> before processing any other
    158
    # commands.  This might be useful in environments in which you do not trust
    159
    # others with access to the host running redis-server.
    160
    #
    161
    # This should stay commented out for backward compatibility and because most
    162
    # people do not need auth (e.g. they run their own servers).
    163
    #
    164
    # Warning: since Redis is pretty fast an outside user can try up to
    165
    # 150k passwords per second against a good box. This means that you should
    166
    # use a very strong password otherwise it will be very easy to break.
    167
    #
    168
    # requirepass foobared
    169
     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 <password>命令提供密码,默认关闭
    170
    # Command renaming.
    171
    #
    172
    # It is possilbe to change the name of dangerous commands in a shared
    173
    # environment. For instance the CONFIG command may be renamed into something
    174
    # of hard to guess so that it will be still available for internal-use
    175
    # tools but not available for general clients.
    176
    #
    177
    # Example:
    178
    #
    179
    # rename-command CONFIG b840fc02d524045429941cc15f59e41cb7be6c52
    180
    #
    181
    # It is also possilbe to completely kill a command renaming it into
    182
    # an empty string:
    183
    #
    184
    # rename-command CONFIG ""
    185
     
    186
    ################################### LIMITS ####################################
    187
     
    188
    # Set the max number of connected clients at the same time. By default there
    189
    # is no limit, and it's up to the number of file descriptors the Redis process
    190
    # is able to open. The special value '0' means no limits.
    191
    # Once the limit is reached Redis will close all the new connections sending
    192
    # an error 'max number of clients reached'.  www.2cto.com  
    193
    #
    194
    # maxclients 128
    195
    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
    196
    # Don't use more memory than the specified amount of bytes.
    197
    # When the memory limit is reached Redis will try to remove keys with an
    198
    # EXPIRE set. It will try to start freeing keys that are going to expire
    199
    # in little time and preserve keys with a longer time to live.
    200
    # Redis will also try to remove objects from free lists if possible.
    201
    #
    202
    # If all this fails, Redis will start to reply with errors to commands
    203
    # that will use more memory, like SET, LPUSH, and so on, and will continue
    204
    # to reply to most read-only commands like GET.
    205
    #
    206
    # WARNING: maxmemory can be a good idea mainly if you want to use Redis as a
    207
    # 'state' server or cache, not as a real DB. When Redis is used as a real
    208
    # database the memory usage will grow over the weeks, it will be obvious if
    209
    # it is going to use too much memory in the long run, and you'll have the time
    210
    # to upgrade. With maxmemory after the limit is reached you'll start to get
    211
    # errors for write operations, and this may even lead to DB inconsistency.
    212
    #
    213
    # maxmemory <bytes>
    214
     maxmemory <bytes>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
    215
    # MAXMEMORY POLICY: how Redis will select what to remove when maxmemory
    216
    # is reached? You can select among five behavior:
    217
    #
    218
    # volatile-lru -> remove the key with an expire set using an LRU algorithm
    219
    # allkeys-lru -> remove any key accordingly to the LRU algorithm
    220
    # volatile-random -> remove a random key with an expire set
    221
    # allkeys->random -> remove a random key, any key
    222
    # volatile-ttl -> remove the key with the nearest expire time (minor TTL)
    223
    # noeviction -> don't expire at all, just return an error on write operations
    224
    #
    225
    # Note: with all the kind of policies, Redis will return an error on write
    226
    #       operations, when there are not suitable keys for eviction.
    227
    #
    228
    #       At the date of writing this commands are: set setnx setex append
    229
    #       incr decr rpush lpush rpushx lpushx linsert lset rpoplpush sadd
    230
    #       sinter sinterstore sunion sunionstore sdiff sdiffstore zadd zincrby
    231
    #       zunionstore zinterstore hset hsetnx hmset hincrby incrby decrby
    232
    #       getset mset msetnx exec sort  www.2cto.com  
    233
    #
    234
    # The default is:
    235
    #
    236
    # maxmemory-policy volatile-lru
    237
     
    238
    # LRU and minimal TTL algorithms are not precise algorithms but approximated
    239
    # algorithms (in order to save memory), so you can select as well the sample
    240
    # size to check. For instance for default Redis will check three keys and
    241
    # pick the one that was used less recently, you can change the sample size
    242
    # using the following configuration directive.
    243
    #
    244
    # maxmemory-samples 3
    245
     
    246
    ############################## APPEND ONLY MODE ###############################
    247
     
    248
    # By default Redis asynchronously dumps the dataset on disk. If you can live
    249
    # with the idea that the latest records will be lost if something like a crash
    250
    # happens this is the preferred way to run Redis. If instead you care a lot
    251
    # about your data and don't want to that a single record can get lost you should
    252
    # enable the append only mode: when this mode is enabled Redis will append
    253
    # every write operation received in the file appendonly.aof. This file will
    254
    # be read on startup in order to rebuild the full dataset in memory.
    255
    #
    256
    # Note that you can have both the async dumps and the append only file if you
    257
    # like (you have to comment the "save" statements above to disable the dumps).
    258
    # Still if append only mode is enabled Redis will load the data from the
    259
    # log file at startup ignoring the dump.rdb file.
    260
    #
    261
    # IMPORTANT: Check the BGREWRITEAOF to check how to rewrite the append
    262
    # log file in background when it gets too big.
    263
     
    264
    appendonly no
    265
    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
    266
    # The name of the append only file (default: "appendonly.aof")
    267
    # appendfilename appendonly.aof
    268
     appendfilename appendonly.aof指定更新日志文件名,默认为appendonly.aof
    269
    # The fsync() call tells the Operating System to actually write data on disk
    270
    # instead to wait for more data in the output buffer. Some OS will really flush
    271
    # data on disk, some other OS will just try to do it ASAP.
    272
    #
    273
    # Redis supports three different modes:
    274
    #
    275
    # no: don't fsync, just let the OS flush the data when it wants. Faster.
    276
    # always: fsync after every write to the append only log . Slow, Safest.
    277
    # everysec: fsync only if one second passed since the last fsync. Compromise.
    278
    #
    279
    # The default is "everysec" that's usually the right compromise between
    280
    # speed and data safety. It's up to you to understand if you can relax this to
    281
    # "no" that will will let the operating system flush the output buffer when
    282
    # it wants, for better performances (but if you can live with the idea of
    283
    # some data loss consider the default persistence mode that's snapshotting),
    284
    # or on the contrary, use "always" that's very slow but a bit safer than
    285
    # everysec.  www.2cto.com  
    286
    #
    287
    # If unsure, use "everysec".
    288
     
    289
    # appendfsync always
    290
    appendfsync everysec
    291
    # appendfsync no
    292
    指定更新日志条件,共有3个可选值:
    293
    no:表示等操作系统进行数据缓存同步到磁盘(快)
    294
    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)
    295
    everysec:表示每秒同步一次(折衷,默认值)
    296
    # When the AOF fsync policy is set to always or everysec, and a background
    297
    # saving process (a background save or AOF log background rewriting) is
    298
    # performing a lot of I/O against the disk, in some configurations
    Linux
    299
    # Redis may block too long on the fsync() call. Note that there is no fix for
    300
    # this currently, as even performing fsync in a different thread will block
    301
    # our synchronous write(2) call.
    302
    #
    303
    # In order to mitigate this problem it's possible to use the following option
    304
    # that will prevent fsync() from being called in the main process while a
    305
    # BGSAVE or BGREWRITEAOF is in progress.
    306
    #
    307
    # This means that while another child is saving the durability of Redis is
    308
    # the same as "appendfsync none", that in pratical terms means that it is
    309
    # possible to lost up to 30 seconds of log in the worst scenario (with the
    310
    # default Linux settings).
    311
    #
    312
    # If you have latency problems turn this to "yes". Otherwise leave it as
    313
    # "no" that is the safest pick from the point of view of durability.
    314
    no-appendfsync-on-rewrite no
    315
     
    316
    # Automatic rewrite of the append only file.
    317
    # Redis is able to automatically rewrite the log file implicitly calling
    318
    # BGREWRITEAOF when the AOF log size will growth by the specified percentage.
    319
    #
    320
    # This is how it works: Redis remembers the size of the AOF file after the
    321
    # latest rewrite (or if no rewrite happened since the restart, the size of
    322
    # the AOF at startup is used).
    323
    #
    324
    # This base size is compared to the current size. If the current size is
    325
    # bigger than the specified percentage, the rewrite is triggered. Also
    326
    # you need to specify a minimal size for the AOF file to be rewritten, this
    327
    # is useful to avoid rewriting the AOF file even if the percentage increase
    328
    # is reached but it is still pretty small.
    329
    #
    330
    # Specify a precentage of zero in order to disable the automatic AOF
    331
    # rewrite feature.  www.2cto.com  
    332
     
    333
    auto-aof-rewrite-percentage 100
    334
    auto-aof-rewrite-min-size 64mb
    335
     
    336
    ################################## SLOW LOG ###################################
    337
     
    338
    # The Redis Slow Log is a system to log queries that exceeded a specified
    339
    # execution time. The execution time does not include the I/O operations
    340
    # like talking with the client, sending the reply and so forth,
    341
    # but just the time needed to actually execute the command (this is the only
    342
    # stage of command execution where the thread is blocked and can not serve
    343
    # other requests in the meantime).
    344
    #
    345
    # You can configure the slow log with two parameters: one tells Redis
    346
    # what is the execution time, in microseconds, to exceed in order for the
    347
    # command to get logged, and the other parameter is the length of the
    348
    # slow log. When a new command is logged the oldest one is removed from the
    349
    # queue of logged commands.
    350
     
    351
    # The following time is expressed in microseconds, so 1000000 is equivalent
    352
    # to one second. Note that a negative number disables the slow log, while
    353
    # a value of zero forces the logging of every command.
    354
    slowlog-log-slower-than 10000
    355
     
    356
    # There is no limit to this length. Just be aware that it will consume memory.
    357
    # You can reclaim memory used by the slow log with SLOWLOG RESET.
    358
    slowlog-max-len 1024
    359
     
    360
    ################################ VIRTUAL MEMORY ###############################
    361
     
    362
    ### WARNING! Virtual Memory is deprecated in Redis 2.4
    363
    ### The use of Virtual Memory is strongly discouraged.
    364
     
    365
    ### WARNING! Virtual Memory is deprecated in Redis 2.4
    366
    ### The use of Virtual Memory is strongly discouraged.
    367
     
    368
    # Virtual Memory allows Redis to work with datasets bigger than the actual
    369
    # amount of RAM needed to hold the whole dataset in memory.
    370
    # In order to do so very used keys are taken in memory while the other keys
    371
    # are swapped into a swap file, similarly to what operating systems do
    372
    # with memory pages.  www.2cto.com  
    373
    #
    374
    # To enable VM just set 'vm-enabled' to yes, and set the following three
    375
    # VM parameters accordingly to your needs.
    376
     
    377
    vm-enabled no
    378
    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)
    379
    # vm-enabled yes
    380
     
    381
    # This is the path of the Redis swap file. As you can guess, swap files
    382
    # can't be shared by different Redis instances, so make sure to use a swap
    383
    # file for every redis process you are running. Redis will complain if the
    384
    # swap file is already in use.
    385
    #
    386
    # The best kind of storage for the Redis swap file (that's accessed at random)
    387
    # is a Solid State Disk (SSD).
    388
    #
    389
    # *** WARNING *** if you are using a shared hosting the default of putting
    390
    # the swap file under /tmp is not secure. Create a dir with access granted
    391
    # only to Redis user and configure Redis to create the swap file there.
    392
    vm-swap-file /tmp/redis.swap
    393
    虚拟内存文件路径,默认值为/tmp/redis.swap,不可多个Redis实例共享
    394
    # vm-max-memory configures the VM to use at max the specified amount of
    395
    # RAM. Everything that deos not fit will be swapped on disk *if* possible, that
    396
    # is, if there is still enough contiguous space in the swap file.
    397
    #
    398
    # With vm-max-memory 0 the system will swap everything it can. Not a good
    399
    # default, just specify the max amount of RAM you can in bytes, but it's
    400
    # better to leave some margin. For instance specify an amount of RAM
    401
    # that's more or less between 60 and 80% of your free RAM.
    402
    vm-max-memory 0  www.2cto.com  
    403
    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
    404
    # Redis swap files is split into pages. An object can be saved using multiple
    405
    # contiguous pages, but pages can't be shared between different objects.
    406
    # So if your page is too big, small objects swapped out on disk will waste
    407
    # a lot of space. If you page is too small, there is less space in the swap
    408
    # file (assuming you configured the same number of total swap file pages).
    409
    #
    410
    # If you use a lot of small objects, use a page size of 64 or 32 bytes.
    411
    # If you use a lot of big objects, use a bigger page size.
    412
    # If unsure, use the default :)
    413
    vm-page-size 32
    414
    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
    415
    # Number of total memory pages in the swap file.
    416
    # Given that the page table (a bitmap of free/used pages) is taken in memory,
    417
    # every 8 pages on disk will consume 1 byte of RAM.
    418
    #
    419
    # The total swap size is vm-page-size * vm-pages
    420
    #
    421
    # With the default of 32-bytes memory pages and 134217728 pages Redis will
    422
    # use a 4 GB swap file, that will use 16 MB of RAM for the page table.
    423
    #
    424
    # It's better to use the smallest acceptable value for your application,
    425
    # but the default is large in order to work in most conditions.
    426
    vm-pages 134217728
    427
    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。
    428
    # Max number of VM I/O threads running at the same time.
    429
    # This threads are used to read/write data from/to swap file, since they
    430
    # also encode and decode objects from disk to memory or the reverse, a bigger
    431
    # number of threads can help with big objects even if they can't help with
    432
    # I/O itself as the physical device may not be able to couple with many
    433
    # reads/writes operations at the same time.  www.2cto.com  
    434
    #
    435
    # The special value of 0 turn off threaded I/O and enables the blocking
    436
    # Virtual Memory implementation.
    437
    vm-max-threads 4
    438
    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
    439
    ############################### ADVANCED CONFIG ###############################
    440
     
    441
    # Hashes are encoded in a special way (much more memory efficient) when they
    442
    # have at max a given numer of elements, and the biggest element does not
    443
    # exceed a given threshold. You can configure this limits with the following
    444
    # configuration directives.
    445
    hash-max-zipmap-entries 512
    446
    hash-max-zipmap-value 64
    447
    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
    448
    # Similarly to hashes, small lists are also encoded in a special way in order
    449
    # to save a lot of space. The special representation is only used when
    450
    # you are under the following limits:
    451
    list-max-ziplist-entries 512
    452
    list-max-ziplist-value 64
    453
     
    454
    # Sets have a special encoding in just one case: when a set is composed
    455
    # of just strings that happens to be integers in radix 10 in the range
    456
    # of 64 bit signed integers.
    457
    # The following configuration setting sets the limit in the size of the
    458
    # set in order to use this special memory saving encoding.
    459
    set-max-intset-entries 512  www.2cto.com  
    460
     
    461
    # Similarly to hashes and lists, sorted sets are also specially encoded in
    462
    # order to save a lot of space. This encoding is only used when the length and
    463
    # elements of a sorted set are below the following limits:
    464
    zset-max-ziplist-entries 128
    465
    zset-max-ziplist-value 64
    466
     
    467
    # Active rehashing uses 1 millisecond every 100 milliseconds of CPU time in
    468
    # order to help rehashing the main Redis hash table (the one mapping top-level
    469
    # keys to values). The hash table implementation redis uses (see dict.c)
    470
    # performs a lazy rehashing: the more operation you run into an hash table
    471
    # that is rhashing, the more rehashing "steps" are performed, so if the
    472
    # server is idle the rehashing is never complete and some more memory is used
    473
    # by the hash table.
    474
    #
    475
    # The default is to use this millisecond 10 times every second in order to
    476
    # active rehashing the main dictionaries, freeing memory when possible.
    477
    #
    478
    # If unsure:
    479
    # use "activerehashing no" if you have hard latency requirements and it is
    480
    # not a good thing in your environment that Redis can reply form time to time
    481
    # to queries with 2 milliseconds delay.
    482
    #
    483
    # use "activerehashing yes" if you don't have such hard requirements but
    484
    # want to free memory asap when possible.
    485
    activerehashing yes  www.2cto.com  
    486
     
    487
    ################################## INCLUDES ###################################
    488
     
    489
    # Include one or more other config files here.  This is useful if you
    490
    # have a standard template that goes to all redis server but also need
    491
    # to customize a few per-server settings.  Include files can include
    492
    # other files, so use this wisely.
    493
    #
    494
    # include /path/to/local.conf
    495
    # include /path/to/other.conf
    496
    指定包含其它的配置文件,可以在同一主机上多个Redis实例之间使用同一份配置文件,而同时各个实例又拥有自己的特定配置文件
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  • 原文地址:https://www.cnblogs.com/zxtceq/p/7245041.html
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