system.caches
Databend 中各种缓存的概览。
下表显示了缓存名称、缓存中的项目数量以及缓存的大小:
SELECT * FROM system.caches;
+--------------------------------+-----------+------+
| name | num_items | size |
+--------------------------------+-----------+------+
| table_snapshot_cache | 2 | 2 |
| table_snapshot_statistic_cache | 0 | 0 |
| segment_info_cache | 64 | 64 |
| bloom_index_filter_cache | 0 | 0 |
| bloom_index_meta_cache | 0 | 0 |
| prune_partitions_cache | 2 | 2 |
| file_meta_data_cache | 0 | 0 |
+--------------------------------+-----------+------+