yiguolei commented on code in PR #49040:
URL: https://github.com/apache/doris/pull/49040#discussion_r2196670274
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be/src/olap/rowset/segment_v2/segment.cpp:
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@@ -87,6 +87,64 @@ std::string file_cache_key_str(const std::string& seg_path) {
return file_cache_key_from_path(seg_path).to_string();
}
+bvar::Adder<int64_t>
g_segment_column_cache_count("segment_column_cache_count");
+bvar::Adder<int64_t>
g_segment_column_cache_hit_count("segment_column_cache_hit_count");
+bvar::Adder<int64_t>
g_segment_column_cache_miss_count("segment_column_cache_miss_count");
+bvar::Adder<int64_t>
g_segment_column_cache_evict_count("segment_column_cache_evict_count");
+
+std::shared_ptr<ColumnReader> ColumnReaderCache::lookup(const
ColumnReaderCacheKey& key) {
+ std::lock_guard<std::mutex> lock(_cache_mutex);
+ auto it = _cache_map.find(key);
+ if (it == _cache_map.end()) {
+ g_segment_column_cache_miss_count << 1;
+ return nullptr;
+ }
+ // Move the accessed node to the front of the linked list
+ _lru_list.splice(_lru_list.begin(), _lru_list, it->second);
+ DCHECK_EQ(it->second->key.first, key.first);
+ g_segment_column_cache_hit_count << 1;
+ return it->second->reader;
+}
+
+Status ColumnReaderCache::insert(const ColumnReaderCacheKey& key, const
ColumnReaderOptions& opts,
Review Comment:
这个代码补充一下单侧
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