[GitHub] [incubator-doris] caiconghui commented on a change in pull request #8146: [Enhancement] Support Skipping compaction lower replica where select queryable replica for better scan performance

[GitBox]

caiconghui commented on a change in pull request #8146:
URL: https://github.com/apache/incubator-doris/pull/8146#discussion_r818277002



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File path: be/src/olap/tablet_manager.h
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@@ -228,12 +226,8 @@ class TabletManager {
     std::map<int64_t, std::set<TabletInfo>> _partition_tablet_map;
     std::vector<TabletSharedPtr> _shutdown_tablets;
 
-    std::mutex _tablet_stat_mutex;
-    // cache to save tablets' statistics, such as data-size and row-count
-    // TODO(cmy): for now, this is a naive implementation
-    std::map<int64_t, TTabletStat> _tablet_stat_cache;
-    // last update time of tablet stat cache
-    int64_t _last_update_stat_ms;
+    std::mutex _tablet_stat_cache_mutex;
+    std::shared_ptr<std::vector<TTabletStat>> _tablet_stat_list_cache = 
std::make_shared<std::vector<TTabletStat>>();

Review comment:
       no，the function will be called more than once




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