Storage and cache monitoring details - ApsaraDB for OceanBase

On the storage and cache monitoring details page of a tenant, you can view monitoring data such as the storage usage, read/write speed, and cache usage of the tenant.

View storage and cache monitoring data

By default, the Storage and Cache tab displays the MemStore usage, storage read/write speed, and cache usage in the last hour. You can specify a time period or click fields in a chart to filter the data to view.

The following table describes the performance metrics.

Note

You can click the question mark (?) next to a monitoring metric to view its details.

Monitoring item	Metric	Description
MemStore	active_memstore_used major_freeze_trigger memstore_limit total_memstore_used	The MemStore usage of the tenant. Unit: MB.
Average number of I/O operations per second	io_read_count io_write_count	The average number of I/O operations per second in the tenant. Unit: times/s.
I/O time	io_read_rt io_write_rt	The average time consumed in each read or write operation in the tenant. Unit: μs.
I/O throughput	io_read_size io_write_size	The average amount of data read or written per second in the tenant. Unit: B.
Cache size	block_cache_size bloom_filter_cache_size clog_cache_size location_cache_size plan_cache_size row_cache_size	The size of a specific type of cache. Unit: MB.
Cache hit rate	block_cache_hit_ratio bloom_filter_cache_hit_ratio clog_cache_hit_ratio location_cache_hit_ratio plan_cache_hit_ratio row_cache_hit_ratio	The hit rate of a specific type of cache in the tenant. Unit: %.
Number of cache requests	block_cache_req_total bloom_filter_cache_req_total clog_cache_req_total location_cache_req_total row_cache_req_total	The number of a specific type of cache requests per second in the tenant. Unit: times/s.