pubsub takes too much memory

[ec1oud]

Version information:

go-ipfs version: 0.4.20-
Repo version: 7
System version: amd64/linux
Golang version: go1.12.4

Description:

Here's output from top after a couple of days:

  PID USER      PR  NI    VIRT    RES  %CPU  %MEM     TIME+ S COMMAND                                                                                           
28739 rutledge  20   0 9407.8m   7.1g  13.1  36.1 886:01.87 S ipfs daemon --enable-pubsub-experiment --enable-namesys-pubsub                                    

I didn't do anything out of the ordinary: not much is pinned, didn't get around to trying anything with pubsub actually. I mainly wondered if it would make ipns perform better.

[Stebalien]

Before you try anything else, please upgrade to 0.4.21. We fixed a bunch of performance issues in 0.4.20 that are likely related.

Then:

1. How does this compare to not running pubsub?
2. Are you frequently resolving IPNS records?
3. Could you walk through https://github.com/ipfs/go-ipfs/blob/master/docs/debug-guide.md#beginning and attach the results to the issue?
4. What's the output of ipfs swarm peers | wc -l and ipfs swarm peers --direction | grep -c outbound?
5. What's the output of ipfs config Swarm.ConnMgr?

[ec1oud]

Hopefully 0.4.21 lands on Arch soon.