title: ETCD OOM a few days later
body: <p>We found our memory usage of etcd is gradually down. But number of bytes used for go gc is gradually up.</p>
  <p><a href="https://user-images.githubusercontent.com/33391637/126043767-872c9f5a-8e5c-41bc-bc21-c7dda44e486c.png" rel="nofollow noreferrer">https://user-images.githubusercontent.com/33391637/126043767-872c9f5a-8e5c-41bc-bc21-c7dda44e486c.png</a></p>
  <p>It's will be OOM a few days later.</p>
  <p>Just don't know why what's happened.
  What do you think of about it above?
  Do I need to provide more metrics information?</p>
  <p>=============================
  Here is the info:</p>
  <pre><code>etcd Version: 3.3.0
  Git SHA: c236067
  Go Version: go1.9.3
  Go OS/Arch: linux/amd64
  </code></pre>
  <p>Part of configuration</p>
  <pre><code>ETCD_QUOTA_BACKEND_BYTES=8589934592
  ETCD_AUTO_COMPACTION_RETENTION=1
  </code></pre>
  <p>OS info</p>
  <pre><code>No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.5 LTS
  Release:        18.04
  Codename:       bionic
  </code></pre>