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-rw-r--r--Documentation/metrics.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/metrics.txt b/Documentation/metrics.txt
index c0e23c5246..bd3a25e250 100644
--- a/Documentation/metrics.txt
+++ b/Documentation/metrics.txt
@@ -63,6 +63,11 @@ objects needing finalization.
* `caches/disk_cached`: Disk entries used by persistent cache.
* `caches/disk_hit_ratio`: Disk hit ratio for persistent cache.
+Cache disk metrics are expensive to compute on larger installations and are not
+computed by default. They can be enabled via the
+link:config.gerrit.html#cache.enableDiskStatMetrics[`cache.enableDiskStatMetrics`]
+setting.
+
=== HTTP
==== Jetty