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doris/be/test/exec
Yingchun Lai 72f3082358 [Metrics] Add some metrics for container size in BE (#3246)
We can observe the workload of BE, and also it's a way to check
whether there is any problem in BE, like some container increase
too large and lead to OOM.

This patch add the following metrics:
```
Name                                   Description
rowset_count_generated_and_in_use      The total count of rowset id generated and in use since BE last start
unused_rowsets_count                   The total count of unused rowset waiting to be GC
broker_count                           The total count of brokers in management
data_stream_receiver_count             The total count of data stream receivers in management
fragment_endpoint_count                The total count of fragment endpoints of data stream in management, should always equal to data_stream_receiver_count
active_scan_context_count              The total count of active scan contexts
plan_fragment_count                    The total count of plan fragments in executing
load_channel_count                     The total count of load channels in management
result_buffer_block_count              The total count of result buffer blocks for queries, each block has a limited queue size (default 1024)
result_block_queue_count               The total count of queues for fragments, each queue has a limited size (default 20, by config::max_memory_sink_batch_count)
routine_load_task_count                The total count of routine load tasks in executing
small_file_cache_count                 The total count of cached small files' digest info
stream_load_pipe_count                 The total count of stream load pipes, each pipe has a limited buffer size (default 1M)
tablet_writer_count                    The total count of tablet writers
brpc_endpoint_stub_count               The total count of brpc endpoints
```
2020-04-25 16:13:39 +08:00
..
2019-06-14 23:38:31 +08:00