[doris] 05/13: [improvement]change shard num of page cache to 1024 to reduce lock contention (#10449)

[morningman]

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morningman pushed a commit to branch dev-1.0.1
in repository https://gitbox.apache.org/repos/asf/doris.git

commit 4ff62b32b43873889ec92a92dbfee05a818b0c71
Author: Yongqiang YANG <98214048+dataroar...@users.noreply.github.com>
AuthorDate: Tue Jun 28 13:54:10 2022 +0800

    [improvement]change shard num of page cache to 1024 to reduce lock 
contention (#10449)
    
    Because shard num of master is changed to be as a config, so here
    we add a isolation commit to 1.0.1.
---
 be/src/olap/lru_cache.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/be/src/olap/lru_cache.h b/be/src/olap/lru_cache.h
index 0c4bf69795..0ff3ce16a6 100644
--- a/be/src/olap/lru_cache.h
+++ b/be/src/olap/lru_cache.h
@@ -357,7 +357,7 @@ private:
     uint64_t _hit_count = 0;    // 命中cache的总次数
 };
 
-static const int kNumShardBits = 4;
+static const int kNumShardBits = 10;
 static const int kNumShards = 1 << kNumShardBits;
 
 class ShardedLRUCache : public Cache {


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