# Lease Time for Cached Table

+ Write operations to the cached table have to wait during the lease period

![`smart`](CachedTablesPrinciple02_aa_001_20220515.png)

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The value of `tidb_table_cache_lease` affects the modification to cached tables. After a modification is made to cached tables, the longest waiting time might be `tidb_table_cache_lease` seconds. If the table is read-only or can accept a longer write latency, you can increase the value of this variable to increase the valid time for caching tables and to reduce the frequency of lease renewal.