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twice pushed a commit to branch unstable
in repository https://gitbox.apache.org/repos/asf/kvrocks.git
The following commit(s) were added to refs/heads/unstable by this push:
new 40904b003 chore(conf): change the default cache to hyper clock cache
(#3343)
40904b003 is described below
commit 40904b003176ecab5fbf1f204e4540b2d5dc727f
Author: hulk <[email protected]>
AuthorDate: Mon Jan 19 11:15:42 2026 +0800
chore(conf): change the default cache to hyper clock cache (#3343)
RocksDB has made the default cache implementation to HyperClockCache
since the version
[v10.7.5](https://github.com/facebook/rocksdb/releases/tag/v10.7.5), so
we could change it as our default cache accordingly.
According to [Hyping the hyper clock cache in
RocksDB](https://smalldatum.blogspot.com/2022/10/hyping-hyper-clock-cache-in-rocksdb.html),
using the hyper clock cache can provide better performance than LRU. But
I didn't reproduce the significant performance difference between them
via `redis-benchmark` on my local.
---
kvrocks.conf | 4 ++--
src/config/config.cc | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/kvrocks.conf b/kvrocks.conf
index dba7eedb6..ad52bb376 100644
--- a/kvrocks.conf
+++ b/kvrocks.conf
@@ -755,8 +755,8 @@ rocksdb.block_cache_size 4096
# that offers much improved CPU efficiency vs. LRU cache under high parallel
# load or high contention.
#
-# default lru
-rocksdb.block_cache_type lru
+# Default: hcc
+rocksdb.block_cache_type hcc
# Number of open files that can be used by the DB. You may need to
# increase this if your database has a large working set. Value -1 means
diff --git a/src/config/config.cc b/src/config/config.cc
index 863bdd432..dd82f8ee7 100644
--- a/src/config/config.cc
+++ b/src/config/config.cc
@@ -277,7 +277,7 @@ Config::Config() {
{"rocksdb.cache_index_and_filter_blocks", true, new
YesNoField(&rocks_db.cache_index_and_filter_blocks, true)},
{"rocksdb.block_cache_size", true, new
IntField(&rocks_db.block_cache_size, 0, 0, INT_MAX)},
{"rocksdb.block_cache_type", true,
- new EnumField<BlockCacheType>(&rocks_db.block_cache_type, cache_types,
BlockCacheType::kCacheTypeLRU)},
+ new EnumField<BlockCacheType>(&rocks_db.block_cache_type, cache_types,
BlockCacheType::kCacheTypeHCC)},
{"rocksdb.subkey_block_cache_size", true, new
IntField(&rocks_db.subkey_block_cache_size, 2048, 0, INT_MAX)},
{"rocksdb.metadata_block_cache_size", true, new
IntField(&rocks_db.metadata_block_cache_size, 2048, 0, INT_MAX)},
{"rocksdb.share_metadata_and_subkey_block_cache", true,
