diff --git src/main/docbkx/ops_mgt.xml src/main/docbkx/ops_mgt.xml
index ffcf1ce..b3b6f82 100644
--- src/main/docbkx/ops_mgt.xml
+++ src/main/docbkx/ops_mgt.xml
@@ -2062,6 +2062,16 @@ hbase> restore_snapshot 'myTableSnapshot-122112'
xrefstyle="template:above" /> should be. So, if your data is compressed and
replicated 3 ways by HDFS, "9 Gb region" means 9 Gb of compressed data. HDFS replication
factor only affects your disk usage and is invisible to most HBase code.
+
+ Viewing the Current Number of Regions
+ You can view the current number of regions using the HMaster UI. Each entry in the
+ list of Region Servers lists how many regions it serves. This total only includes the
+ in-memory state and does not include disabled or offline regions. If you do not want to
+ use the HMaster UI, you can determine the number of regions by counting the number of
+ subdirectories of the /hbase/<table>/ subdirectories in HDFS, or by running the
+ bin/hbase hbck command. Each of these methods may return a slightly
+ different number, depending on the status of each region.
+
Number of regions per RS - upper bound