diff --git a/src/common/src/cache.rs b/src/common/src/cache.rs
index 111fb823d6f46..99a373d6a94a8 100644
--- a/src/common/src/cache.rs
+++ b/src/common/src/cache.rs
@@ -1049,7 +1049,7 @@ mod tests {
 
     #[test]
     fn test_cache_shard() {
-        let cache = Arc::new(LruCache::<(u64, u64), Block>::new(2, 256, 0));
+        let cache = Arc::new(LruCache::<(u64, u64), Block>::new(4, 256, 0));
         assert_eq!(cache.shard(0), 0);
         assert_eq!(cache.shard(1), 1);
         assert_eq!(cache.shard(10), 2);
@@ -1349,7 +1349,7 @@ mod tests {
 
     #[test]
     fn test_write_request_pending() {
-        let cache = Arc::new(LruCache::new(0, 5, 0));
+        let cache = Arc::new(LruCache::new(1, 5, 0));
         {
             let mut shard = cache.shards[0].lock();
             insert(&mut shard, "a", "v1");
@@ -1394,7 +1394,7 @@ mod tests {
     #[test]
     fn test_event_listener() {
         let listener = Arc::new(TestLruCacheEventListener::default());
-        let cache = Arc::new(LruCache::with_event_listener(0, 2, 0, listener.clone()));
+        let cache = Arc::new(LruCache::with_event_listener(1, 2, 0, listener.clone()));
 
         // full-fill cache
         let h = cache.insert(
@@ -1489,7 +1489,7 @@ mod tests {
 
     #[tokio::test]
     async fn test_future_cancel() {
-        let cache: Arc<LruCache<u64, u64>> = Arc::new(LruCache::new(0, 5, 0));
+        let cache: Arc<LruCache<u64, u64>> = Arc::new(LruCache::new(1, 5, 0));
         // do not need sender because this receiver will be cancelled.
         let (_, recv) = channel::<()>();
         let polled = Arc::new(AtomicBool::new(false));
diff --git a/src/compute/src/memory/config.rs b/src/compute/src/memory/config.rs
index f37869e53d57d..a6eee7c2416d3 100644
--- a/src/compute/src/memory/config.rs
+++ b/src/compute/src/memory/config.rs
@@ -33,7 +33,7 @@ const COMPACTOR_MEMORY_PROPORTION: f64 = 0.1;
 const STORAGE_BLOCK_CACHE_MEMORY_PROPORTION: f64 = 0.3;
 
 const STORAGE_META_CACHE_MAX_MEMORY_MB: usize = 4096;
-const STORAGE_SHARED_BUFFER_MAX_MEMORY_MB: usize = 1024;
+const STORAGE_SHARED_BUFFER_MAX_MEMORY_MB: usize = 4096;
 const STORAGE_META_CACHE_MEMORY_PROPORTION: f64 = 0.35;
 const STORAGE_SHARED_BUFFER_MEMORY_PROPORTION: f64 = 0.3;
 const STORAGE_DEFAULT_HIGH_PRIORITY_BLOCK_CACHE_RATIO: usize = 50;
@@ -95,7 +95,8 @@ pub fn storage_memory_config(
 
     if meta_cache_capacity_mb != default_meta_cache_capacity_mb {
         default_block_cache_capacity_mb += default_meta_cache_capacity_mb;
-        default_block_cache_capacity_mb -= meta_cache_capacity_mb;
+        default_block_cache_capacity_mb =
+            default_block_cache_capacity_mb.saturating_sub(meta_cache_capacity_mb);
     }
 
     let default_shared_buffer_capacity_mb = ((non_reserved_memory_bytes as f64
@@ -112,7 +113,8 @@ pub fn storage_memory_config(
             ));
     if shared_buffer_capacity_mb != default_shared_buffer_capacity_mb {
         default_block_cache_capacity_mb += default_shared_buffer_capacity_mb;
-        default_block_cache_capacity_mb -= shared_buffer_capacity_mb;
+        default_block_cache_capacity_mb =
+            default_block_cache_capacity_mb.saturating_sub(shared_buffer_capacity_mb);
     }
     let block_cache_capacity_mb = storage_config
         .block_cache_capacity_mb
@@ -170,15 +172,15 @@ pub fn storage_memory_config(
 
     StorageMemoryConfig {
         block_cache_capacity_mb,
+        block_shard_num,
         meta_cache_capacity_mb,
+        meta_shard_num,
         shared_buffer_capacity_mb,
         data_file_cache_ring_buffer_capacity_mb,
         meta_file_cache_ring_buffer_capacity_mb,
         compactor_memory_limit_mb,
         prefetch_buffer_capacity_mb,
         high_priority_ratio_in_percent,
-        block_shard_num,
-        meta_shard_num,
     }
 }
 
diff --git a/src/config/docs.md b/src/config/docs.md
index 452caa81e83fc..3730b4e828f6d 100644
--- a/src/config/docs.md
+++ b/src/config/docs.md
@@ -94,6 +94,7 @@ This page is automatically generated by `./risedev generate-example-config`
 | Config | Description | Default |
 |--------|-------------|---------|
 | block_cache_capacity_mb |  Capacity of sstable block cache. |  |
+| block_shard_num |  |  |
 | cache_refill |  |  |
 | check_compaction_result |  | false |
 | compact_iter_recreate_timeout_ms |  | 600000 |
@@ -118,6 +119,7 @@ This page is automatically generated by `./risedev generate-example-config`
 | mem_table_spill_threshold |  The spill threshold for mem table. | 4194304 |
 | meta_cache_capacity_mb |  Capacity of sstable meta cache. |  |
 | meta_file_cache |  |  |
+| meta_shard_num |  |  |
 | min_sst_size_for_streaming_upload |  Whether to enable streaming upload for sstable. | 33554432 |
 | object_store |  |  |
 | prefetch_buffer_capacity_mb |  max memory usage for large query |  |
diff --git a/src/storage/benches/bench_compactor.rs b/src/storage/benches/bench_compactor.rs
index edab0d067778d..9d960572b8d0f 100644
--- a/src/storage/benches/bench_compactor.rs
+++ b/src/storage/benches/bench_compactor.rs
@@ -65,6 +65,8 @@ pub fn mock_sstable_store() -> SstableStoreRef {
         block_cache_capacity: 64 << 20,
         meta_cache_capacity: 128 << 20,
         high_priority_ratio: 0,
+        meta_shard_num: 2,
+        block_shard_num: 2,
         prefetch_buffer_capacity: 64 << 20,
         max_prefetch_block_number: 16,
         data_file_cache: FileCache::none(),
diff --git a/src/storage/benches/bench_multi_builder.rs b/src/storage/benches/bench_multi_builder.rs
index bdc288b4d6925..590fb1a6f497e 100644
--- a/src/storage/benches/bench_multi_builder.rs
+++ b/src/storage/benches/bench_multi_builder.rs
@@ -147,6 +147,8 @@ fn bench_builder(
         block_cache_capacity: 64 << 20,
         meta_cache_capacity: 128 << 20,
         high_priority_ratio: 0,
+        meta_shard_num: 2,
+        block_shard_num: 2,
         prefetch_buffer_capacity: 64 << 20,
         max_prefetch_block_number: 16,
         data_file_cache: FileCache::none(),