xref: /redis-3.2.3/redis.conf (revision edd7eb9b)
1# Redis configuration file example
2
3# Note on units: when memory size is needed, it is possible to specify
4# it in the usual form of 1k 5GB 4M and so forth:
5#
6# 1k => 1000 bytes
7# 1kb => 1024 bytes
8# 1m => 1000000 bytes
9# 1mb => 1024*1024 bytes
10# 1g => 1000000000 bytes
11# 1gb => 1024*1024*1024 bytes
12#
13# units are case insensitive so 1GB 1Gb 1gB are all the same.
14
15# By default Redis does not run as a daemon. Use 'yes' if you need it.
16# Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
17daemonize no
18
19# When running daemonized, Redis writes a pid file in /var/run/redis.pid by
20# default. You can specify a custom pid file location here.
21pidfile /var/run/redis.pid
22
23# Accept connections on the specified port, default is 6379.
24# If port 0 is specified Redis will not listen on a TCP socket.
25port 6379
26
27# If you want you can bind a single interface, if the bind option is not
28# specified all the interfaces will listen for incoming connections.
29#
30# bind 127.0.0.1
31
32# Specify the path for the unix socket that will be used to listen for
33# incoming connections. There is no default, so Redis will not listen
34# on a unix socket when not specified.
35#
36# unixsocket /tmp/redis.sock
37# unixsocketperm 755
38
39# Close the connection after a client is idle for N seconds (0 to disable)
40timeout 0
41
42# TCP keepalive.
43#
44# If non-zero, use SO_KEEPALIVE to send TCP ACKs to clients in absence
45# of communication. This is useful for two reasons:
46#
47# 1) Detect dead peers.
48# 2) Take the connection alive from the point of view of network
49#    equipment in the middle.
50#
51# On Linux, the specified value (in seconds) is the period used to send ACKs.
52# Note that to close the connection the double of the time is needed.
53# On other kernels the period depends on the kernel configuration.
54#
55# A reasonable value for this option is 60 seconds.
56tcp-keepalive 0
57
58# Specify the server verbosity level.
59# This can be one of:
60# debug (a lot of information, useful for development/testing)
61# verbose (many rarely useful info, but not a mess like the debug level)
62# notice (moderately verbose, what you want in production probably)
63# warning (only very important / critical messages are logged)
64loglevel notice
65
66# Specify the log file name. Also the emptry string can be used to force
67# Redis to log on the standard output. Note that if you use standard
68# output for logging but daemonize, logs will be sent to /dev/null
69logfile ""
70
71# To enable logging to the system logger, just set 'syslog-enabled' to yes,
72# and optionally update the other syslog parameters to suit your needs.
73# syslog-enabled no
74
75# Specify the syslog identity.
76# syslog-ident redis
77
78# Specify the syslog facility. Must be USER or between LOCAL0-LOCAL7.
79# syslog-facility local0
80
81# Set the number of databases. The default database is DB 0, you can select
82# a different one on a per-connection basis using SELECT <dbid> where
83# dbid is a number between 0 and 'databases'-1
84databases 16
85
86################################ SNAPSHOTTING  #################################
87#
88# Save the DB on disk:
89#
90#   save <seconds> <changes>
91#
92#   Will save the DB if both the given number of seconds and the given
93#   number of write operations against the DB occurred.
94#
95#   In the example below the behaviour will be to save:
96#   after 900 sec (15 min) if at least 1 key changed
97#   after 300 sec (5 min) if at least 10 keys changed
98#   after 60 sec if at least 10000 keys changed
99#
100#   Note: you can disable saving at all commenting all the "save" lines.
101#
102#   It is also possible to remove all the previously configured save
103#   points by adding a save directive with a single empty string argument
104#   like in the following example:
105#
106#   save ""
107
108save 900 1
109save 300 10
110save 60 10000
111
112# By default Redis will stop accepting writes if RDB snapshots are enabled
113# (at least one save point) and the latest background save failed.
114# This will make the user aware (in an hard way) that data is not persisting
115# on disk properly, otherwise chances are that no one will notice and some
116# distater will happen.
117#
118# If the background saving process will start working again Redis will
119# automatically allow writes again.
120#
121# However if you have setup your proper monitoring of the Redis server
122# and persistence, you may want to disable this feature so that Redis will
123# continue to work as usually even if there are problems with disk,
124# permissions, and so forth.
125stop-writes-on-bgsave-error yes
126
127# Compress string objects using LZF when dump .rdb databases?
128# For default that's set to 'yes' as it's almost always a win.
129# If you want to save some CPU in the saving child set it to 'no' but
130# the dataset will likely be bigger if you have compressible values or keys.
131rdbcompression yes
132
133# Since version 5 of RDB a CRC64 checksum is placed at the end of the file.
134# This makes the format more resistant to corruption but there is a performance
135# hit to pay (around 10%) when saving and loading RDB files, so you can disable it
136# for maximum performances.
137#
138# RDB files created with checksum disabled have a checksum of zero that will
139# tell the loading code to skip the check.
140rdbchecksum yes
141
142# The filename where to dump the DB
143dbfilename dump.rdb
144
145# The working directory.
146#
147# The DB will be written inside this directory, with the filename specified
148# above using the 'dbfilename' configuration directive.
149#
150# The Append Only File will also be created inside this directory.
151#
152# Note that you must specify a directory here, not a file name.
153dir ./
154
155################################# REPLICATION #################################
156
157# Master-Slave replication. Use slaveof to make a Redis instance a copy of
158# another Redis server. Note that the configuration is local to the slave
159# so for example it is possible to configure the slave to save the DB with a
160# different interval, or to listen to another port, and so on.
161#
162# slaveof <masterip> <masterport>
163
164# If the master is password protected (using the "requirepass" configuration
165# directive below) it is possible to tell the slave to authenticate before
166# starting the replication synchronization process, otherwise the master will
167# refuse the slave request.
168#
169# masterauth <master-password>
170
171# When a slave loses its connection with the master, or when the replication
172# is still in progress, the slave can act in two different ways:
173#
174# 1) if slave-serve-stale-data is set to 'yes' (the default) the slave will
175#    still reply to client requests, possibly with out of date data, or the
176#    data set may just be empty if this is the first synchronization.
177#
178# 2) if slave-serve-stale-data is set to 'no' the slave will reply with
179#    an error "SYNC with master in progress" to all the kind of commands
180#    but to INFO and SLAVEOF.
181#
182slave-serve-stale-data yes
183
184# You can configure a slave instance to accept writes or not. Writing against
185# a slave instance may be useful to store some ephemeral data (because data
186# written on a slave will be easily deleted after resync with the master) but
187# may also cause problems if clients are writing to it because of a
188# misconfiguration.
189#
190# Since Redis 2.6 by default slaves are read-only.
191#
192# Note: read only slaves are not designed to be exposed to untrusted clients
193# on the internet. It's just a protection layer against misuse of the instance.
194# Still a read only slave exports by default all the administrative commands
195# such as CONFIG, DEBUG, and so forth. To a limited extend you can improve
196# security of read only slaves using 'rename-command' to shadow all the
197# administrative / dangerous commands.
198slave-read-only yes
199
200# Slaves send PINGs to server in a predefined interval. It's possible to change
201# this interval with the repl_ping_slave_period option. The default value is 10
202# seconds.
203#
204# repl-ping-slave-period 10
205
206# The following option sets the replication timeout for:
207#
208# 1) Bulk transfer I/O during SYNC, from the point of view of slave.
209# 2) Master timeout from the point of view of slaves (data, pings).
210# 3) Slave timeout from the point of view of masters (REPLCONF ACK pings).
211#
212# It is important to make sure that this value is greater than the value
213# specified for repl-ping-slave-period otherwise a timeout will be detected
214# every time there is low traffic between the master and the slave.
215#
216# repl-timeout 60
217
218# Disable TCP_NODELAY on the slave socket after SYNC?
219#
220# If you select "yes" Redis will use a smaller number of TCP packets and
221# less bandwidth to send data to slaves. But this can add a delay for
222# the data to appear on the slave side, up to 40 milliseconds with
223# Linux kernels using a default configuration.
224#
225# If you select "no" the delay for data to appear on the slave side will
226# be reduced but more bandwidth will be used for replication.
227#
228# By default we optimize for low latency, but in very high traffic conditions
229# or when the master and slaves are many hops away, turning this to "yes" may
230# be a good idea.
231repl-disable-tcp-nodelay no
232
233# Set the replication backlog size. The backlog is a buffer that accumulates
234# slave data when slaves are disconnected for some time, so that when a slave
235# wants to reconnect again, often a full resync is not needed, but a partial
236# resync is enough, just passing the portion of data the slave missed while
237# disconnected.
238#
239# The biggest the replication backlog, the longer the time the slave can be
240# disconnected and later be able to perform a partial resynchronization.
241#
242# The backlog is only allocated once there is at least a slave connected.
243#
244# repl-backlog-size 1mb
245
246# After a master has no longer connected slaves for some time, the backlog
247# will be freed. The following option configures the amount of seconds that
248# need to elapse, starting from the time the last slave disconnected, for
249# the backlog buffer to be freed.
250#
251# A value of 0 means to never release the backlog.
252#
253# repl-backlog-ttl 3600
254
255# The slave priority is an integer number published by Redis in the INFO output.
256# It is used by Redis Sentinel in order to select a slave to promote into a
257# master if the master is no longer working correctly.
258#
259# A slave with a low priority number is considered better for promotion, so
260# for instance if there are three slaves with priority 10, 100, 25 Sentinel will
261# pick the one wtih priority 10, that is the lowest.
262#
263# However a special priority of 0 marks the slave as not able to perform the
264# role of master, so a slave with priority of 0 will never be selected by
265# Redis Sentinel for promotion.
266#
267# By default the priority is 100.
268slave-priority 100
269
270# It is possible for a master to stop accepting writes if there are less than
271# N slaves connected, having a lag less or equal than M seconds.
272#
273# The N slaves need to be in "online" state.
274#
275# The lag in seconds, that must be <= the specified value, is calculated from
276# the last ping received from the slave, that is usually sent every second.
277#
278# This option does not GUARANTEES that N replicas will accept the write, but
279# will limit the window of exposure for lost writes in case not enough slaves
280# are available, to the specified number of seconds.
281#
282# For example to require at least 3 slaves with a lag <= 10 seconds use:
283#
284# min-slaves-to-write 3
285# min-slaves-max-lag 10
286#
287# Setting one or the other to 0 disables the feature.
288#
289# By default min-slaves-to-write is set to 0 (feature disabled) and
290# min-slaves-max-lag is set to 10.
291
292################################## SECURITY ###################################
293
294# Require clients to issue AUTH <PASSWORD> before processing any other
295# commands.  This might be useful in environments in which you do not trust
296# others with access to the host running redis-server.
297#
298# This should stay commented out for backward compatibility and because most
299# people do not need auth (e.g. they run their own servers).
300#
301# Warning: since Redis is pretty fast an outside user can try up to
302# 150k passwords per second against a good box. This means that you should
303# use a very strong password otherwise it will be very easy to break.
304#
305# requirepass foobared
306
307# Command renaming.
308#
309# It is possible to change the name of dangerous commands in a shared
310# environment. For instance the CONFIG command may be renamed into something
311# hard to guess so that it will still be available for internal-use tools
312# but not available for general clients.
313#
314# Example:
315#
316# rename-command CONFIG b840fc02d524045429941cc15f59e41cb7be6c52
317#
318# It is also possible to completely kill a command by renaming it into
319# an empty string:
320#
321# rename-command CONFIG ""
322#
323# Please note that changing the name of commands that are logged into the
324# AOF file or transmitted to slaves may cause problems.
325
326################################### LIMITS ####################################
327
328# Set the max number of connected clients at the same time. By default
329# this limit is set to 10000 clients, however if the Redis server is not
330# able to configure the process file limit to allow for the specified limit
331# the max number of allowed clients is set to the current file limit
332# minus 32 (as Redis reserves a few file descriptors for internal uses).
333#
334# Once the limit is reached Redis will close all the new connections sending
335# an error 'max number of clients reached'.
336#
337# maxclients 10000
338
339# Don't use more memory than the specified amount of bytes.
340# When the memory limit is reached Redis will try to remove keys
341# accordingly to the eviction policy selected (see maxmemmory-policy).
342#
343# If Redis can't remove keys according to the policy, or if the policy is
344# set to 'noeviction', Redis will start to reply with errors to commands
345# that would use more memory, like SET, LPUSH, and so on, and will continue
346# to reply to read-only commands like GET.
347#
348# This option is usually useful when using Redis as an LRU cache, or to set
349# an hard memory limit for an instance (using the 'noeviction' policy).
350#
351# WARNING: If you have slaves attached to an instance with maxmemory on,
352# the size of the output buffers needed to feed the slaves are subtracted
353# from the used memory count, so that network problems / resyncs will
354# not trigger a loop where keys are evicted, and in turn the output
355# buffer of slaves is full with DELs of keys evicted triggering the deletion
356# of more keys, and so forth until the database is completely emptied.
357#
358# In short... if you have slaves attached it is suggested that you set a lower
359# limit for maxmemory so that there is some free RAM on the system for slave
360# output buffers (but this is not needed if the policy is 'noeviction').
361#
362# maxmemory <bytes>
363
364# MAXMEMORY POLICY: how Redis will select what to remove when maxmemory
365# is reached. You can select among five behaviors:
366#
367# volatile-lru -> remove the key with an expire set using an LRU algorithm
368# allkeys-lru -> remove any key accordingly to the LRU algorithm
369# volatile-random -> remove a random key with an expire set
370# allkeys-random -> remove a random key, any key
371# volatile-ttl -> remove the key with the nearest expire time (minor TTL)
372# noeviction -> don't expire at all, just return an error on write operations
373#
374# Note: with any of the above policies, Redis will return an error on write
375#       operations, when there are not suitable keys for eviction.
376#
377#       At the date of writing this commands are: set setnx setex append
378#       incr decr rpush lpush rpushx lpushx linsert lset rpoplpush sadd
379#       sinter sinterstore sunion sunionstore sdiff sdiffstore zadd zincrby
380#       zunionstore zinterstore hset hsetnx hmset hincrby incrby decrby
381#       getset mset msetnx exec sort
382#
383# The default is:
384#
385# maxmemory-policy volatile-lru
386
387# LRU and minimal TTL algorithms are not precise algorithms but approximated
388# algorithms (in order to save memory), so you can select as well the sample
389# size to check. For instance for default Redis will check three keys and
390# pick the one that was used less recently, you can change the sample size
391# using the following configuration directive.
392#
393# maxmemory-samples 3
394
395############################## APPEND ONLY MODE ###############################
396
397# By default Redis asynchronously dumps the dataset on disk. This mode is
398# good enough in many applications, but an issue with the Redis process or
399# a power outage may result into a few minutes of writes lost (depending on
400# the configured save points).
401#
402# The Append Only File is an alternative persistence mode that provides
403# much better durability. For instance using the default data fsync policy
404# (see later in the config file) Redis can lose just one second of writes in a
405# dramatic event like a server power outage, or a single write if something
406# wrong with the Redis process itself happens, but the operating system is
407# still running correctly.
408#
409# AOF and RDB persistence can be enabled at the same time without problems.
410# If the AOF is enabled on startup Redis will load the AOF, that is the file
411# with the better durability guarantees.
412#
413# Please check http://redis.io/topics/persistence for more information.
414
415appendonly no
416
417# The name of the append only file (default: "appendonly.aof")
418# appendfilename appendonly.aof
419
420# The fsync() call tells the Operating System to actually write data on disk
421# instead to wait for more data in the output buffer. Some OS will really flush
422# data on disk, some other OS will just try to do it ASAP.
423#
424# Redis supports three different modes:
425#
426# no: don't fsync, just let the OS flush the data when it wants. Faster.
427# always: fsync after every write to the append only log . Slow, Safest.
428# everysec: fsync only one time every second. Compromise.
429#
430# The default is "everysec", as that's usually the right compromise between
431# speed and data safety. It's up to you to understand if you can relax this to
432# "no" that will let the operating system flush the output buffer when
433# it wants, for better performances (but if you can live with the idea of
434# some data loss consider the default persistence mode that's snapshotting),
435# or on the contrary, use "always" that's very slow but a bit safer than
436# everysec.
437#
438# More details please check the following article:
439# http://antirez.com/post/redis-persistence-demystified.html
440#
441# If unsure, use "everysec".
442
443# appendfsync always
444appendfsync everysec
445# appendfsync no
446
447# When the AOF fsync policy is set to always or everysec, and a background
448# saving process (a background save or AOF log background rewriting) is
449# performing a lot of I/O against the disk, in some Linux configurations
450# Redis may block too long on the fsync() call. Note that there is no fix for
451# this currently, as even performing fsync in a different thread will block
452# our synchronous write(2) call.
453#
454# In order to mitigate this problem it's possible to use the following option
455# that will prevent fsync() from being called in the main process while a
456# BGSAVE or BGREWRITEAOF is in progress.
457#
458# This means that while another child is saving, the durability of Redis is
459# the same as "appendfsync none". In practical terms, this means that it is
460# possible to lose up to 30 seconds of log in the worst scenario (with the
461# default Linux settings).
462#
463# If you have latency problems turn this to "yes". Otherwise leave it as
464# "no" that is the safest pick from the point of view of durability.
465no-appendfsync-on-rewrite no
466
467# Automatic rewrite of the append only file.
468# Redis is able to automatically rewrite the log file implicitly calling
469# BGREWRITEAOF when the AOF log size grows by the specified percentage.
470#
471# This is how it works: Redis remembers the size of the AOF file after the
472# latest rewrite (if no rewrite has happened since the restart, the size of
473# the AOF at startup is used).
474#
475# This base size is compared to the current size. If the current size is
476# bigger than the specified percentage, the rewrite is triggered. Also
477# you need to specify a minimal size for the AOF file to be rewritten, this
478# is useful to avoid rewriting the AOF file even if the percentage increase
479# is reached but it is still pretty small.
480#
481# Specify a percentage of zero in order to disable the automatic AOF
482# rewrite feature.
483
484auto-aof-rewrite-percentage 100
485auto-aof-rewrite-min-size 64mb
486
487################################ LUA SCRIPTING  ###############################
488
489# Max execution time of a Lua script in milliseconds.
490#
491# If the maximum execution time is reached Redis will log that a script is
492# still in execution after the maximum allowed time and will start to
493# reply to queries with an error.
494#
495# When a long running script exceed the maximum execution time only the
496# SCRIPT KILL and SHUTDOWN NOSAVE commands are available. The first can be
497# used to stop a script that did not yet called write commands. The second
498# is the only way to shut down the server in the case a write commands was
499# already issue by the script but the user don't want to wait for the natural
500# termination of the script.
501#
502# Set it to 0 or a negative value for unlimited execution without warnings.
503lua-time-limit 5000
504
505################################ REDIS CLUSTER  ###############################
506#
507# Normal Redis instances can't be part of a Redis Cluster; only nodes that are
508# started as cluster nodes can. In order to start a Redis instance as a
509# cluster node enable the cluster support uncommenting the following:
510#
511# cluster-enabled yes
512
513# Every cluster node has a cluster configuration file. This file is not
514# intended to be edited by hand. It is created and updated by Redis nodes.
515# Every Redis Cluster node requires a different cluster configuration file.
516# Make sure that instances running in the same system does not have
517# overlapping cluster configuration file names.
518#
519# cluster-config-file nodes-6379.conf
520
521# Cluster node timeout is the amount of seconds a node must be unreachable
522# for it to be considered in failure state.
523# Most other internal time limits are multiplicators of the node timeout.
524#
525# cluster-node-timeout 15
526
527# In order to setup your cluster make sure to read the documentation
528# available at http://redis.io web site.
529
530################################## SLOW LOG ###################################
531
532# The Redis Slow Log is a system to log queries that exceeded a specified
533# execution time. The execution time does not include the I/O operations
534# like talking with the client, sending the reply and so forth,
535# but just the time needed to actually execute the command (this is the only
536# stage of command execution where the thread is blocked and can not serve
537# other requests in the meantime).
538#
539# You can configure the slow log with two parameters: one tells Redis
540# what is the execution time, in microseconds, to exceed in order for the
541# command to get logged, and the other parameter is the length of the
542# slow log. When a new command is logged the oldest one is removed from the
543# queue of logged commands.
544
545# The following time is expressed in microseconds, so 1000000 is equivalent
546# to one second. Note that a negative number disables the slow log, while
547# a value of zero forces the logging of every command.
548slowlog-log-slower-than 10000
549
550# There is no limit to this length. Just be aware that it will consume memory.
551# You can reclaim memory used by the slow log with SLOWLOG RESET.
552slowlog-max-len 128
553
554############################# Event notification ##############################
555
556# Redis can notify Pub/Sub clients about events happening in the key space.
557# This feature is documented at http://redis.io/topics/keyspace-events
558#
559# For instance if keyspace events notification is enabled, and a client
560# performs a DEL operation on key "foo" stored in the Database 0, two
561# messages will be published via Pub/Sub:
562#
563# PUBLISH __keyspace@0__:foo del
564# PUBLISH __keyevent@0__:del foo
565#
566# It is possible to select the events that Redis will notify among a set
567# of classes. Every class is identified by a single character:
568#
569#  K     Keyspace events, published with __keyspace@<db>__ prefix.
570#  E     Keyevent events, published with __keyevent@<db>__ prefix.
571#  g     Generic commands (non-type specific) like DEL, EXPIRE, RENAME, ...
572#  $     String commands
573#  l     List commands
574#  s     Set commands
575#  h     Hash commands
576#  z     Sorted set commands
577#  x     Expired events (events generated every time a key expires)
578#  e     Evicted events (events generated when a key is evicted for maxmemory)
579#  A     Alias for g$lshzxe, so that the "AKE" string means all the events.
580#
581#  The "notify-keyspace-events" takes as argument a string that is composed
582#  by zero or multiple characters. The empty string means that notifications
583#  are disabled at all.
584#
585#  Example: to enable list and generic events, from the point of view of the
586#           event name, use:
587#
588#  notify-keyspace-events Elg
589#
590#  Example 2: to get the stream of the expired keys subscribing to channel
591#             name __keyevent@0__:expired use:
592#
593#  notify-keyspace-events Ex
594#
595#  By default all notifications are disabled because most users don't need
596#  this feature and the feature has some overhead. Note that if you don't
597#  specify at least one of K or E, no events will be delivered.
598notify-keyspace-events ""
599
600############################### ADVANCED CONFIG ###############################
601
602# Hashes are encoded using a memory efficient data structure when they have a
603# small number of entries, and the biggest entry does not exceed a given
604# threshold. These thresholds can be configured using the following directives.
605hash-max-ziplist-entries 512
606hash-max-ziplist-value 64
607
608# Similarly to hashes, small lists are also encoded in a special way in order
609# to save a lot of space. The special representation is only used when
610# you are under the following limits:
611list-max-ziplist-entries 512
612list-max-ziplist-value 64
613
614# Sets have a special encoding in just one case: when a set is composed
615# of just strings that happens to be integers in radix 10 in the range
616# of 64 bit signed integers.
617# The following configuration setting sets the limit in the size of the
618# set in order to use this special memory saving encoding.
619set-max-intset-entries 512
620
621# Similarly to hashes and lists, sorted sets are also specially encoded in
622# order to save a lot of space. This encoding is only used when the length and
623# elements of a sorted set are below the following limits:
624zset-max-ziplist-entries 128
625zset-max-ziplist-value 64
626
627# Active rehashing uses 1 millisecond every 100 milliseconds of CPU time in
628# order to help rehashing the main Redis hash table (the one mapping top-level
629# keys to values). The hash table implementation Redis uses (see dict.c)
630# performs a lazy rehashing: the more operation you run into an hash table
631# that is rehashing, the more rehashing "steps" are performed, so if the
632# server is idle the rehashing is never complete and some more memory is used
633# by the hash table.
634#
635# The default is to use this millisecond 10 times every second in order to
636# active rehashing the main dictionaries, freeing memory when possible.
637#
638# If unsure:
639# use "activerehashing no" if you have hard latency requirements and it is
640# not a good thing in your environment that Redis can reply form time to time
641# to queries with 2 milliseconds delay.
642#
643# use "activerehashing yes" if you don't have such hard requirements but
644# want to free memory asap when possible.
645activerehashing yes
646
647# The client output buffer limits can be used to force disconnection of clients
648# that are not reading data from the server fast enough for some reason (a
649# common reason is that a Pub/Sub client can't consume messages as fast as the
650# publisher can produce them).
651#
652# The limit can be set differently for the three different classes of clients:
653#
654# normal -> normal clients
655# slave  -> slave clients and MONITOR clients
656# pubsub -> clients subcribed to at least one pubsub channel or pattern
657#
658# The syntax of every client-output-buffer-limit directive is the following:
659#
660# client-output-buffer-limit <class> <hard limit> <soft limit> <soft seconds>
661#
662# A client is immediately disconnected once the hard limit is reached, or if
663# the soft limit is reached and remains reached for the specified number of
664# seconds (continuously).
665# So for instance if the hard limit is 32 megabytes and the soft limit is
666# 16 megabytes / 10 seconds, the client will get disconnected immediately
667# if the size of the output buffers reach 32 megabytes, but will also get
668# disconnected if the client reaches 16 megabytes and continuously overcomes
669# the limit for 10 seconds.
670#
671# By default normal clients are not limited because they don't receive data
672# without asking (in a push way), but just after a request, so only
673# asynchronous clients may create a scenario where data is requested faster
674# than it can read.
675#
676# Instead there is a default limit for pubsub and slave clients, since
677# subscribers and slaves receive data in a push fashion.
678#
679# Both the hard or the soft limit can be disabled by setting them to zero.
680client-output-buffer-limit normal 0 0 0
681client-output-buffer-limit slave 256mb 64mb 60
682client-output-buffer-limit pubsub 32mb 8mb 60
683
684# Redis calls an internal function to perform many background tasks, like
685# closing connections of clients in timeot, purging expired keys that are
686# never requested, and so forth.
687#
688# Not all tasks are performed with the same frequency, but Redis checks for
689# tasks to perform accordingly to the specified "hz" value.
690#
691# By default "hz" is set to 10. Raising the value will use more CPU when
692# Redis is idle, but at the same time will make Redis more responsive when
693# there are many keys expiring at the same time, and timeouts may be
694# handled with more precision.
695#
696# The range is between 1 and 500, however a value over 100 is usually not
697# a good idea. Most users should use the default of 10 and raise this up to
698# 100 only in environments where very low latency is required.
699hz 10
700
701# When a child rewrites the AOF file, if the following option is enabled
702# the file will be fsync-ed every 32 MB of data generated. This is useful
703# in order to commit the file to the disk more incrementally and avoid
704# big latency spikes.
705aof-rewrite-incremental-fsync yes
706
707################################## INCLUDES ###################################
708
709# Include one or more other config files here.  This is useful if you
710# have a standard template that goes to all Redis server but also need
711# to customize a few per-server settings.  Include files can include
712# other files, so use this wisely.
713#
714# include /path/to/local.conf
715# include /path/to/other.conf
716