diff --git a/www/Utils.js b/www/Utils.js
index cea69ffc..50dd4d7e 100644
--- a/www/Utils.js
+++ b/www/Utils.js
@@ -858,6 +858,10 @@ Ext.define('PBS.Utils', {
 	gc_atime_cutoff = gc_atime_cutoff ?? '1445';
 	options.push(`${gettext('GC Access Time Cutoff')}: ${gc_atime_cutoff}m`);
 
+	let gc_cache_capacity = tuning['gc-cache-capacity'];
+	delete tuning['gc-cache-capacity'];
+	options.push(`${gettext('GC cache capacity')}: ${gc_cache_capacity ?? Proxmox.Utils.defaultText}`);
+
 	for (const [k, v] of Object.entries(tuning)) {
 	    options.push(`${k}: ${v}`);
 	}
diff --git a/www/datastore/OptionView.js b/www/datastore/OptionView.js
index 9d28b829..de7751e8 100644
--- a/www/datastore/OptionView.js
+++ b/www/datastore/OptionView.js
@@ -295,6 +295,16 @@ Ext.define('PBS.Datastore.Options', {
 			    },
 			    deleteEmpty: true,
 			},
+			{
+			    xtype: 'proxmoxintegerfield',
+			    name: 'gc-cache-capacity',
+			    fieldLabel: gettext('GC cache capacity'),
+			    emptyText: Proxmox.Utils.defaultText,
+			    minValue: 0,
+			    maxValue: 8192 * 1024,
+			    deleteEmpty: true,
+			    step: 1024,
+			},
 		    ],
 		},
 	    },