diff --git a/modules/ROOT/pages/platform/metrics-integration.adoc b/modules/ROOT/pages/platform/metrics-integration.adoc index bdd415c63..f52f903f7 100644 --- a/modules/ROOT/pages/platform/metrics-integration.adoc +++ b/modules/ROOT/pages/platform/metrics-integration.adoc @@ -387,6 +387,22 @@ This helps avoid unwanted pauses for garbage collection. m| MAX |=== +.Page Cache Hit Ratio (per minute) +[frame="topbot", stripes=odd, grid="cols", cols="<1,<4"] +|=== +| Metric name +m| neo4j_dbms_page_cache_hit_ratio_per_minute +| Description +| The percentage of times data required during query execution was found in memory vs needing to be read from disk. +Ideally the whole graph should fit into memory, and this should consistently be between 98% and 100%. +If this value is consistently or significantly under 100%, check the page cache usage ratio to see if the graph is too large to fit into memory. +A high amount of insert or update activity on a graph can also cause this value to change. +| Metric type +| _Gauge_ +| Default aggregation +m| AVG +|=== + .Page Cache Usage Ratio [frame="topbot", stripes=odd, grid="cols", cols="<1,<4"] |===