X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/054e426dbd7f5d4788c68fca653e1d4819adeec0..57ca68acc16cedb39409ce5e513f9c2dd6f29182:/redis.conf diff --git a/redis.conf b/redis.conf index 8b8f34a7..909f03bf 100644 --- a/redis.conf +++ b/redis.conf @@ -1,5 +1,17 @@ # 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 @@ -133,7 +145,7 @@ dir ./ # 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.log. This file will +# 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 @@ -141,7 +153,7 @@ dir ./ # Still if append only mode is enabled Redis will load the data from the # log file at startup ignoring the dump.rdb file. # -# The name of the append only file is "appendonly.log" +# The name of the append only file is "appendonly.aof" # # IMPORTANT: Check the BGREWRITEAOF to check how to rewrite the append # log file in background when it gets too big. @@ -158,14 +170,18 @@ appendonly no # 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 "always" that's the safer of the options. It's up to you to -# understand if you can relax this to "everysec" that will fsync every second -# or to "no" that will let the operating system flush the output buffer when -# it want, for better performances (but if you can live with the idea of -# some data loss consider the default persistence mode that's snapshotting). +# 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 always +appendfsync everysec # appendfsync no ################################ VIRTUAL MEMORY ############################### @@ -193,17 +209,21 @@ vm-enabled no # # Useless to say, the best kind of disk for a 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-%p.vm # 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 10000000 the system will swap almost 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 80% of your free RAM. -vm-max-memory 10000000 +# 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 # 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. @@ -214,7 +234,7 @@ vm-max-memory 10000000 # 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 256 +vm-page-size 32 # Number of total memory pages in the swap file. # Given that the page table (a bitmap of free/used pages) is taken in memory, @@ -222,12 +242,12 @@ vm-page-size 256 # # The total swap size is vm-page-size * vm-pages # -# With the default of 256-bytes memory pages and 104857600 pages Redis will -# use a 25 GB swap file, that will use roughly 13 MB of RAM for the page table. +# 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 104857600 +vm-pages 134217728 # 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 @@ -247,19 +267,39 @@ vm-max-threads 4 # in terms of number of queries per second. Use 'yes' if unsure. glueoutputbuf yes -# Use object sharing. Can save a lot of memory if you have many common -# string in your dataset, but performs lookups against the shared objects -# pool so it uses more CPU and can be a bit slower. Usually it's a good -# idea. -# -# When object sharing is enabled (shareobjects yes) you can use -# shareobjectspoolsize to control the size of the pool used in order to try -# object sharing. A bigger pool size will lead to better sharing capabilities. -# In general you want this value to be at least the double of the number of -# very common strings you have in your dataset. -# -# WARNING: object sharing is experimental, don't enable this feature -# in production before of Redis 1.0-stable. Still please try this feature in -# your development environment so that we can test it better. -shareobjects no -shareobjectspoolsize 1024 +# 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 64 +hash-max-zipmap-value 512 + +# 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