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Memory grows slowly #551

Description

@dxsup

Describe the bug

The memory of the agent grows slowly.

Screenshots

The screenshot from a user shows that the memory usage of some agents is over 1GiB.
28131690442699_ pic

Trouble shooting
Run the following command:

curl http://IP:6060/debug/pprof/heap -o heap
go tool pprof heap
> web

We can get the following heap graph:
pprof001

It shows the inuse heap of kindling-collector is only 365MiB. So the kindling-probe may use more than 700MiB memory.

Environment (please complete the following information)

  • Kindling agent version: v0.8.0
  • Node Kernel version: 5.4.240-1.el7.elrepo.x86_64

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