Add docs to metric spec for auto compaction (#12415)
Add docs to metric spec for auto compaction (#12415)

* add docs

* Update docs/configuration/index.md

Co-authored-by: Victoria Lim <820b856591242699e6755d5c3d0571c6dffb34a8@users.noreply.github.com>

* Update index.md

* Update docs/configuration/index.md

Co-authored-by: Victoria Lim <820b856591242699e6755d5c3d0571c6dffb34a8@users.noreply.github.com>

Co-authored-by: Victoria Lim <820b856591242699e6755d5c3d0571c6dffb34a8@users.noreply.github.com>
monetate/druid,monetate/druid,monetate/druid,monetate/druid,monetate/druid,monetate/druid,monetate/druid