diff --git src/main/docbkx/cp.xml src/main/docbkx/cp.xml
index 7062d7d..80269ca 100644
--- src/main/docbkx/cp.xml
+++ src/main/docbkx/cp.xml
@@ -402,6 +402,28 @@ coprocessors=[AggregateImplementation]
+ Monitor Time Spent in Coprocessors
+ HBase 0.98.5 introduced the ability to monitor some statistics relating to the amount of
+ time spent executing a given coprocessor. You can see these statistics via the HBase Metrics
+ framework (see or the Web UI for a given Region Server, via
+ the Coprocessor Metrics tab. These statistics are valuable for debugging
+ and benchmarking the performance impact of a given coprocessor on your cluster. Tracked
+ statistics include min, max, average, and 90th, 95th, and 99th percentile. All times are shown
+ in milliseconds.
+
+ Coprocessor Metrics UI
+
+
+
+
+
+ The Coprocessor Metrics UI shows statistics about time spent executing a given
+ processor, including min, max, average, and 90th, 95th, and 99th percentile.
+
+
+
+
+ Status of Coprocessors in HBase Coprocessors and the coprocessor framework are evolving rapidly and work is ongoing on
several different JIRAs.
diff --git src/main/site/resources/images/coprocessor_stats.png src/main/site/resources/images/coprocessor_stats.png
new file mode 100644
index 0000000..2fc8703
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