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Version: Candidate-4.0

inspect_memory

inspect_memory(module_name)

This function returns the estimated memory usage for a specified module.

Arguments​

module_name: The name of the module (VARCHAR).

NOTE: The following module names are supported (for more details, see the MemoryUsageTracker.java class):

  • Load
  • Compaction
  • Export
  • Delete
  • Transaction
  • Backup
  • Task
  • TabletInvertedIndex
  • LocalMetastore
  • Report
  • MV
  • Query
  • Profile
  • Agent
  • Statistics
  • Coordinator
  • Dict

Return Value​

Returns a VARCHAR string representing the estimated memory size (e.g., "100MB").

Examples​

Example 1: Inspect current FE's Load module memory usage:

mysql> SELECT inspect_memory('Load');
+------------------------+
| inspect_memory('Load') |
+------------------------+
| 251.8KB                |
+------------------------+
1 row in set (0.00 sec)