Flushing all keys in Memcached is used when you want to completely clear the cache. This is useful in scenarios like:
Ruby uses the Dalli gem to interact with Memcached servers. Here's an example of how you can flush (clear) all data:
In this code,
Dalli::Client.new('localhost:11211') creates a new client for the Memcached server running on localhost port 11211. The
flush command then clears all data from the server.
flush_allwhen absolutely necessary, as it will delete everything from the cache which may cause a temporary performance hit while the cache is repopulated.
flush_allduring low traffic hours, or during maintenance windows.
flush_allduring peak load times can result in slow responses as requests are redirected to the database instead of the fast cache.
flush_all immediately delete all entries?
flush_all doesn't immediately remove items, but it does make them immediately inaccessible. They're actually deleted as part of Memcached's normal item expiration and replacement process.
Q: Can I undo a
A: No, once issued, a
flush_all command cannot be undone. Be cautious when using this operation.