# Redis can notify Pub/Sub clients about events happening in the key space.
# This feature is documented at
#
# For instance if keyspace events notification is enabled, and a client
# performs a DEL operation on key "foo" stored in the Database 0, two
# messages will be published via Pub/Sub:
#
# PUBLISH __keyspace@0__:foo del
# PUBLISH __keyevent@0__:del foo
#
# It is possible to select the events that Redis will notify among a set
# of classes. Every class is identified by a single character:
#
# K Keyspace events, published with __keyspace@<db>__ prefix.
# E Keyevent events, published with __keyevent@<db>__ prefix.
# g Generic commands (non-type specific) like DEL, EXPIRE, RENAME, ...
# $ String commands
# l List commands
# s Set commands
# h Hash commands
# z Sorted set commands
# x Expired events (events generated every time a key expires)
# e Evicted events (events generated when a key is evicted for maxmemory)
# A Alias for g$lshzxe, so that the "AKE" string means all the events.
#
# The "notify-keyspace-events" takes as argument a string that is composed
# of zero or multiple characters. The empty string means that notifications
# are disabled.
#
# Example: to enable list and generic events, from the point of view of the
# event name, use:
#
# notify-keyspace-events Elg
#
# Example 2: to get the stream of the expired keys subscribing to channel
# name __keyevent@0__:expired use:
#
# notify-keyspace-events Ex
#
# By default all notifications are disabled because most users don't need
# this feature and the feature has some overhead. Note that if you don't
# specify at least one of K or E, no events will be delivered.
#
# Redis 能通知 Pub/Sub 客户端关于键空间发生的事件
# 这个功能文档位于
#
# 例如：如果键空间事件通知被开启，并且客户端对 0 号数据库的键 foo 执行 DEL 命令时，将通过
# Pub/Sub发布两条消息：
# PUBLISH __keyspace@0__:foo del
# PUBLISH __keyevent@0__:del foo
#
# 可以在下表中选择Redis要通知的事件类型。事件类型由单个字符来标识：
#
# K 键空间通知，以__keyspace@<db>__为前缀
# E 键事件通知，以__keysevent@<db>__为前缀
# g DEL , EXPIRE , RENAME 等类型无关的通用命令的通知, ...
# $ String命令
# l List命令
# s Set命令
# h Hash命令
# z 有序集合命令
# x 过期事件（每次key过期时生成）
# e 驱逐事件（当key在内存满了被清除时���成）
# A g$lshzxe的别名，因此”AKE”意味着所有的事件
#
# notify-keyspace-events 带一个由0到多个字符组成的字符串参数。空字符串意思是通知被禁用。
#
# 例子：启用List和通用事件通知：
# notify-keyspace-events Elg
#
# 例子2：为了获取过期key的通知订阅名字为 __keyevent@__:expired 的频道，用以下配置
# notify-keyspace-events Ex
#
# 默认所用的通知被禁用，因为用户通常不需要该特性，并且该特性会有性能损耗。
# 注意如果你不指定至少K或E之一，不会发送任何事件。
#
notify-keyspace-events ""
############################### ADVANCED CONFIG ###############################
# Hashes are encoded using a memory efficient data structure when they have a
# small number of entries, and the biggest entry does not exceed a given
# threshold. These thresholds can be configured using the following directives.
# 当hash只有少量的entry时，并且最大的entry所占空间没有超过指定的限制时，会用一种节省内存的
# 数据结构来编码。可以通过下面的指令来设定限制
hash-max-ziplist-entries 512
hash-max-ziplist-value 64