add rate limiter comment for conf/pika.conf

README.md

@@ -68,7 +68,7 @@ The User can download the binary release from [releases](https://github.com/Qiho
 
 * linux - Ubuntu
 
-* macOS (Darwin) on M1
+* macOS
 
 #### Dependencies
 
@@ -98,7 +98,7 @@ Upgrade your gcc to version at least 7 to get C++17 support.
 
 3. Compile
 
-Please run the script build.sh before you compile this db to check the environment and build this repo. 
+Please run the script build.sh before you compile this db to check the environment and build this repo.
 If the gcc version is later than 7, such as CentOS6 or centOS7, you need to upgrade the gcc version first
 
 Do as follows

README_CN.md

@@ -62,7 +62,7 @@ Pika是一个可持久化的大容量redis存储服务，兼容string、hash、l
 
 * linux - Ubuntu
 
-* macOS(Darwin) on M1
+* macOS(Darwin)
 
 #### 依赖软件
 * gcc g++ 支持C++17 （version>=7）

conf/pika.conf

@@ -304,36 +304,50 @@ max-bytes-for-level-multiplier : 10
 
 # BlockBasedTable block_size, default 4k
 # block-size: 4096
+
 # block LRU cache, default 8M, 0 to disable
 # Supported Units [K|M|G], default unit [bytes]
 # block-cache: 8388608
+
 # num-shard-bits default -1, the number of bits from cache keys to be use as shard id.
 # The cache will be sharded into 2^num_shard_bits shards.
 # https://github.com/EighteenZi/rocksdb_wiki/blob/master/Block-Cache.md#lru-cache
 # num-shard-bits: -1
+
 # whether the block cache is shared among the RocksDB instances, default is per CF
 # share-block-cache: no
+
 # whether or not index and filter blocks is stored in block cache
 # cache-index-and-filter-blocks: no
+
 # pin_l0_filter_and_index_blocks_in_cache [yes | no]
 # When `cache-index-and-filter-blocks` is enabled, `pin_l0_filter_and_index_blocks_in_cache` is suggested to be enabled
 # pin_l0_filter_and_index_blocks_in_cache : no
+
 # when set to yes, bloomfilter of the last level will not be built
 # optimize-filters-for-hits: no
 # https://github.com/facebook/rocksdb/wiki/Leveled-Compaction#levels-target-size
 # level-compaction-dynamic-level-bytes: no
 
+###########################
+# rocksdb rate limiter
+# https://rocksdb.org/blog/2017/12/18/17-auto-tuned-rate-limiter.html
+# https://github.com/EighteenZi/rocksdb_wiki/blob/master/Rate-Limiter.md
+###########################
+
 # rate limiter bandwidth, default 200MB
 #rate-limiter-bandwidth : 209715200
 
-# rate limiter auto tune https://rocksdb.org/blog/2017/12/18/17-auto-tuned-rate-limiter.html
-# default: false
 #rate-limiter-refill-period-us : 100000
+#
 #rate-limiter-fairness: 10
+
+# rate limiter auto tune https://rocksdb.org/blog/2017/12/18/17-auto-tuned-rate-limiter.html. the default value is false.
 #rate-limiter-auto-tuned : true
 
 ###########################
 # rocksdb blob configure
+# https://rocksdb.org/blog/2021/05/26/integrated-blob-db.html
 # wiki https://github.com/facebook/rocksdb/wiki/BlobDB
 ###########################