morningman commented on a change in pull request #349: Improve the Backend's
disk info report performance
URL: https://github.com/apache/incubator-doris/pull/349#discussion_r236072019
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File path: be/src/olap/olap_engine.cpp
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@@ -529,20 +529,60 @@ OLAPStatus
OLAPEngine::get_all_root_path_info(vector<RootPathInfo>* root_paths_i
OLAPStatus res = OLAP_SUCCESS;
root_paths_info->clear();
- std::lock_guard<std::mutex> l(_store_lock);
- for (auto& it : _store_map) {
- root_paths_info->emplace_back(it.second->to_root_path_info());
+ MonotonicStopWatch timer;
+ timer.start();
+ int tablet_counter = 0;
+
+ // get all root path info and construct a path map.
+ // path -> RootPathInfo
+ std::map<std::string, RootPathInfo> path_map;
+ {
+ std::lock_guard<std::mutex> l(_store_lock);
+ for (auto& it : _store_map) {
+ std::string path = it.first;
+ path_map.emplace(path, it.second->to_root_path_info());
+ // if this path is not used, init it's info
+ if (!path_map[path].is_used) {
+ path_map[path].capacity = 1;
Review comment:
Capacity is set in Store.cpp. And I think the capacity will not change. If
it changes, the Backend process must be restarted and the capacity is set when
store is being initialized.
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