Diagnosing latency issues
Finding the causes of slow responses This document will help you understand what the problem could be if you are experiencing latency problems with Redis. In this context latency is the maximum delay between the time a client issues a command and the time the reply to the command is received by the client. Usually Redis processing time is extremely low, in the sub microsecond range, but there are
ZRANGEBYLEX
ZRANGEBYLEX key min max [LIMIT offset count] Available since: 2.8.9 Time complexity: O(log(N)+M) with N being the number of elements in the sorted set and M the number of elements being returned. If M is constant (e.g. always asking for the first 10 elements with LIMIT), you can consider it O(log(N)). ACL categories: @read, @sortedset, @slow, When all the elements in a sorted set are inserted with
Redis Pub/Sub
How to use pub/sub channels in Redis SUBSCRIBE, UNSUBSCRIBE and PUBLISH implement the Publish/Subscribe messaging paradigm where (citing Wikipedia) senders (publishers) are not programmed to send their messages to specific receivers (subscribers). Rather, published messages are characterized into channels, without knowledge of what (if any) subscribers there may be. Subscribers express interest in
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