diff --git a/pageserver/src/metrics.rs b/pageserver/src/metrics.rs
index fcba76a3d2..96ee157856 100644
--- a/pageserver/src/metrics.rs
+++ b/pageserver/src/metrics.rs
@@ -1326,10 +1326,10 @@ impl SmgrOpFlushInProgress {
         let mut observe_guard = scopeguard::guard(
             || {
                 let elapsed = now - self.base;
-                // self.global_micros
-                //     .inc_by(u64::try_from(elapsed.as_micros()).unwrap());
-                // self.per_timeline_micros
-                //     .inc_by(u64::try_from(elapsed.as_micros()).unwrap());
+                self.global_micros
+                    .inc_by(u64::try_from(elapsed.as_micros()).unwrap());
+                self.per_timeline_micros
+                    .inc_by(u64::try_from(elapsed.as_micros()).unwrap());
                 self.base = now;
             },
             |mut observe| {