pageserver/metrics: add get kind label for get reconstruct data time

pageserver/src/metrics.rs

@@ -146,13 +146,33 @@ pub(crate) static MATERIALIZED_PAGE_CACHE_HIT_DIRECT: Lazy<IntCounter> = Lazy::n
     .expect("failed to define a metric")
 });
 
-pub(crate) static GET_RECONSTRUCT_DATA_TIME: Lazy<Histogram> = Lazy::new(|| {
-    register_histogram!(
+pub(crate) struct ReconstructDataTimeMetrics {
+    singular: Histogram,
+    vectored: Histogram,
+}
+
+impl ReconstructDataTimeMetrics {
+    pub(crate) fn for_get_kind(&self, get_kind: GetKind) -> &Histogram {
+        match get_kind {
+            GetKind::Singular => &self.singular,
+            GetKind::Vectored => &self.vectored,
+        }
+    }
+}
+
+pub(crate) static GET_RECONSTRUCT_DATA_TIME: Lazy<ReconstructDataTimeMetrics> = Lazy::new(|| {
+    let inner = register_histogram_vec!(
         "pageserver_getpage_get_reconstruct_data_seconds",
         "Time spent in get_reconstruct_value_data",
+        &["get_kind"],
         CRITICAL_OP_BUCKETS.into(),
     )
-    .expect("failed to define a metric")
+    .expect("failed to define a metric");
+
+    ReconstructDataTimeMetrics {
+        singular: inner.with_label_values(&[GetKind::Singular.into()]),
+        vectored: inner.with_label_values(&[GetKind::Vectored.into()]),
+    }
 });
 
 pub(crate) static MATERIALIZED_PAGE_CACHE_HIT: Lazy<IntCounter> = Lazy::new(|| {

pageserver/src/tenant/timeline.rs

@@ -730,7 +730,9 @@ impl Timeline {
             img: cached_page_img,
         };
 
-        let timer = crate::metrics::GET_RECONSTRUCT_DATA_TIME.start_timer();
+        let timer = crate::metrics::GET_RECONSTRUCT_DATA_TIME
+            .for_get_kind(crate::metrics::GetKind::Singular)
+            .start_timer();
         let path = self
             .get_reconstruct_data(key, lsn, &mut reconstruct_state, ctx)
             .await?;