Description

ctr c ls use much memory

Every container has over 4000 environment variables (because user use default value enableServiceLinks:true on k8s and has many services) ctr c ls will use about 523m memory

pprof
ctr01.pb.gz

Steps to reproduce the issue

1.create many service on a node
2.ctr -n k8s.io c ls
3.[root]$ ps -auxf|grep ctr|grep k8s.io
root 668412 64.0 0.1 1197256 535788 pts/4 Sl+ 22:58 0:00 | _ ctr -n k8s.io c ls

Describe the results you received and expected

ctr c ls use less memory

What version of containerd are you using?

any

Any other relevant information

No response

Show configuration if it is related to CRI plugin.

any