The 'php memcached flush_all' operation is typically used when you need to invalidate or clear all data from your Memcached server. This can be necessary in several scenarios, such as:
flush method of the PHP
Memcached class, you can erase all data from all servers in your pool. Here's a simple example:
In this code snippet, we first create a
Memcached instance and add a server to our pool. We add some sample data to the cache. Finally, we call the
flush function to delete all data from the server.
Please note that Memcached's
flush function doesn't immediately remove items, but invalidates them for future get requests.
flushcommand invalidates all data on all servers, so it should be used sparingly and with caution in production environments.
flushfunction. It returns
TRUEon success or
One common mistake is the assumption that
flush instantly removes all items from the server. In reality, it sets them to be expired. Newly set items with the same key will not be affected, but get operations will not find the old data.
Q: Does the 'flush' operation immediately free up memory?
A: No, the 'flush' operation only marks items as expired. The memory they occupy is freed up gradually as new data is stored in the cache.