doc: document tuning of object gateway garbage collection

Fixes: https://tracker.ceph.com/issues/47189
Signed-off-by: mhackett <mhackett@redhat.com>

diff --git a/doc/radosgw/config-ref.rst b/doc/radosgw/config-ref.rst
index c818e11aa8e95f95ff8228d6ec837f177b25566d..117567ed7043164eefa2cedefe42788a1e3863ec 100644 (file)
--- a/doc/radosgw/config-ref.rst
+++ b/doc/radosgw/config-ref.rst
@@ -456,6 +456,17 @@ configuration parameters.
 :Default: ``10``
 
 
+:Tuning Garbage Collection for Delete Heavy Workloads:
+
+As an initial step towards tuning Ceph Garbage Collection to be more aggressive the following options are suggested to be increased from their default configuration values:
+
+``rgw gc max concurrent io = 20``
+``rgw gc max trim chunk = 64``
+
+:NOTE: Modifying these values requires a restart of the RGW service.
+
+Once these values have been increased from default please monitor for performance of the cluster during Garbage Collection to verify no adverse performance issues due to the increased values.
+
 Multisite Settings
 ==================