1. replace all boost::shared_ptr to std::shared_ptr
2. replace all boost::scopted_ptr to std::unique_ptr
3. replace all boost::scoped_array to std::unique<T[]>
4. replace all boost:thread to std::thread
This CL mainly changes:
1. the `storage_page_cache_limit` is based on config `mem_limit`
the default is 20% of `mem_limit`.
2. the `buffer_pool_limit` is based on config `mem_limit`
the default is 20% of `mem_limit`.
3. the `buffer_pool_clean_pages_limit` is based on config `buffer_pool_limit`
the default is 50% of `buffer_pool_limit`
4. Fix some show bugs of lru cache hit ratio and usage ratio
5. Fix a create view bug that `notEvalNondeterministicFunction` should be reset after analyze.
To avoid showing too many memtracker on BE web pages.
The MemTracker level now has 3 levels: OVERVIEW, TASK and VERBOSE.
OVERVIEW Mainly used for main memory consumption module such as Query/Load/Metadata.
TASK is mainly used to record the memory overhead of a single task such as a single query, load, and compaction task.
VERBOSE is used for other more detailed memtrackers.
According to the LRU priority, the `lru list` is split into `lru normal list` and `lru durable list`,
and the two lists are traversed in sequence during LRU evict, avoiding invalid cycles.
1 Make some MemTracker have reasonable parent MemTracker not the root tracker
2 Make each MemTracker can be easily to trace.
3 Add show level of MemTracker to reduce the MemTracker show in the web page to have a way to control show how many tracker in web page.
* [Enhance] Make MemTracker more accurate (#5515)
This PR main about:
1. Improve the readability of MemTrackers' name
2. Add the MemTracker of:
* Load
* Compaction
* SchemaChange
* StoragePageCache
* TabletManager
3. Change SchemaChange to a Singleon
* revise some code for Code Review
* change the name of mem_tracker
* keep reader_context have the same lifetime of rowset_reader in schema change.
* change vlog notice to log(warning) in schema change
At present, the application of vlog in the code is quite confusing.
It is inherited from impala VLOG_XX format, and there is also VLOG(number) format.
VLOG(number) format does not have a unified specification, so this pr standardizes the use of VLOG
When LRUCache insert and evict a large number of entries, there are
frequently calls of HandleTable::remove(e->key, e->hash), it will
lookup the entry in the hash table. Now that we know the entry to
remove 'e', we can remove it directly from hash table's collision list
if it's a double linked list.
This patch refactor the collision list to double linked list, the simple
benchmark CacheTest.SimpleBenchmark shows that time cost reduced about
18% in my test environment.
NOTE: This patch would modify all Backend's data.
And this will cause a very long time to restart be.
So if you want to interferer your product environment,
you should upgrade backend one by one.
1. Refactoring be is to clarify the structure the codes.
2. Use unique id to indicate a rowset.
Nameing rowset with tablet_id and version will lead to
many conflicts among compaction, clone, restore.
3. Extract an rowset interface to encapsulate rowsets
with different format.
