Idle connections in redis

[Dbz Fan]

I tried establishing 6 connections to redis(by starting 6 threas from ) and was periodically firing "INFO" command , I observed the no. of clients was not constant although it was  always less than 9 (2sentinel client , one client was redis-cli so the remaning were normal clients) (same was shown with "client list" command) .

I was trying to maintain a constant throughput of around 40 request per second , Is it possible that redis was  to achieve this throughput wih a fewer number of connections so therefore other connections were not shown in "INFO" and "client list" commands.

I checked redis logs it does not report any client disconnection. Also timeout is set to 0 in redis.conf

[Itamar Haber]

The use of threads in your application does not, alas, guarantee a dedicated connection per thread - that depends on your code (is each thread using one and only one connection?) and the Redis client that you're using (is it thread-safe? are you using it correctly? are there any connection pools involved?  is your client "thin" and exposes the standard API or is it something more elaborate that "thinks"?). You can have more, less or exactly 6 client connections depending on these.

In terms of throughput, that also depends on many factors, but 40 RPS should be easily doable even by the tiniest and weakest Redis instance.

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Itamar Haber | Chief Developers Advocate
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[Dbz Fan]

So does that mean redis itself is not in any way responsible for change in no. of clients?