diff --git a/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementAdjustWorkflow.php b/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementAdjustWorkflow.php
index 8733a3d618..61a799deed 100644
--- a/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementAdjustWorkflow.php
+++ b/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementAdjustWorkflow.php
@@ -123,6 +123,14 @@ final class PhabricatorStorageManagementAdjustWorkflow
       }
     }
 
+    $console->writeOut(
+      "%s\n",
+      pht('Dropping caches, for faster migrations...'));
+
+    $root = dirname(phutil_get_library_root('phabricator'));
+    $bin = $root.'/bin/cache';
+    phutil_passthru('%s purge --purge-all', $bin);
+
     $console->writeOut(
       "%s\n",
       pht('Fixing schema issues...'));