May 2016
Beginner to intermediate
366 pages
8h 47m
English
Content preview from Mastering RedisBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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LRU key evictions
To demonstrate the various options for key evictions in Redis, we'll start with a simple example by setting a small memory Redis instance that the maxmemory directive sets to 1 megabyte. The maxmemory directive allows you set a hard upper bound on the amount of memory that is available to a running Redis instance. Echoing the warnings in the default redis.conf file, setting the maxmemory has ramifications that we'll now see. To start with, we'll just create a very simple Redis key schema, that of generating and storing a unique id for a web application. After connecting to a Redis instance through Redis-cli, we'll run the following commands to clear out our datastore and then set the maxmemory directive to 1 megabyte:
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