# Hot Table Cache - Applications
__*Hot Table Cache application*__
+ TiDB limits the size of each cache table to 64 MB
+ It is suitable for scenario queries are frequent, the amount of data is small, and there are few modify
+ Writes are blocked during the lease (tidb_table_cache_lease) time
+ When the lease expires (tidb_table_cache_lease), the read performance decreases
+ Direct DDL operations on cached tables are not supported, and need to be shut down first
+ For tables that load slowly or are rarely modify, tidb_table_cache_lease can be extended appropriately to maintain stable read performance

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