DOC-8560: plasma requires hole punching for compaction (#2026)

* Add note on hole punching

* Clarify terminology

modules/learn/pages/services-and-indexes/indexes/storage-modes.adoc

@@ -51,6 +51,8 @@ The performance of standard index storage depends on overall I/O performance.
 
 In Couchbase Server Enterprise Edition, standard index-storage is supported by the _Plasma_ storage engine.
 In this case, compaction is handled automatically.
+
+However, for installations of Couchbase Server Enterprise Edition running on Linux, note that hole punching is required to enable auto-compaction of Global Secondary Indexes using standard index-storage.
 ****
 
 ****

modules/manage/pages/manage-settings/configure-compact-settings.adoc

@@ -16,6 +16,14 @@ Auto-compaction settings affect _on-disk_ data, and therefore do not apply to Ep
 
 Full and Cluster administrators can configure compaction settings with xref:manage:manage-settings/configure-compact-settings.adoc#configure-auto-compaction-with-the-ui[Couchbase Web Console], the Couchbase xref:manage:manage-settings/configure-compact-settings.adoc#configure-auto-compaction-with-the-cli[CLI], or the xref:manage:manage-settings/configure-compact-settings.adoc#configure-auto-compaction-with-the-rest-api[REST] API.
 
+****
+[.edition]#{enterprise}#
+
+In Couchbase Server Enterprise Edition, auto-compaction does not apply to memory-optimized index storage, and there are no settings necessary for configuring the auto-compaction of Global Secondary Indexes using standard index storage.
+
+However, for installations of Couchbase Server Enterprise Edition running on Linux, note that hole punching is required to enable auto-compaction of Global Secondary Indexes using standard index storage.
+****
+
 [#configure-auto-compaction-with-the-ui]
 == Configure Auto-Compaction with the UI