Clearing a Cache
When you clear a cache, you remove all elements from that cache.
If the cache is distributed, this procedure removes all elements from that cache on the Terracotta Server Array.
Note:
You can only clear a cache that belongs to a public cache manager.
To clear a cache
1. Open Integration Server Administrator if it is not already open.
2. Go to Settings > Caching.
3. Under Public Cache Managers, click the cache manager associated with the cache you want to clear.
4. Under Cache List, click the clear icon 
next to the cache that you want to clear. 5. When prompted to confirm that you want to clear the cache, click OK.
Note:
If the clear operation encounters any previously acquired locks on elements, the operation will wait until all the locks are released. As a result, if the locks are not released, the clear operation may wait indefinitely to complete.