diff --git a/book/src/performance-metrics.md b/book/src/performance-metrics.md
index fef9d24843..7727e52995 100644
--- a/book/src/performance-metrics.md
+++ b/book/src/performance-metrics.md
@@ -7,14 +7,16 @@ confirmed by super majority of the cluster (Confirmation Time).
 Each cluster node maintains various counters that are incremented on certain events.
 These counters are periodically uploaded to a cloud based database. Solana's metrics
 dashboard fetches these counters, and computes the performance metrics and displays
-it on the dashboard. 
+it on the dashboard.
 
 ## TPS
 
-The leader node's banking stage maintains a count of transactions that it recorded.
-The dashboard displays the count averaged over 2 second period in the TPS time series
-graph. The dashboard also shows per second mean, maximum and total TPS as a running
-counter.
+Each node's bank runtime maintains a count of transactions that it has processed.
+The dashboard first calculates the median count of transactions across all metrics
+enabled nodes in the cluster. The median cluster transaction count is then averaged
+over a 2 second period and displayed in the TPS time series graph. The dashboard also
+shows the Mean TPS, Max TPS and Total Transaction Count stats which are all calculated from
+the median transaction count.
 
 ## Confirmation Time
 
@@ -26,4 +28,4 @@ super majority vote, and when one of its children forks is frozen.
 The node assigns a timestamp to every new fork, and computes the time it took to confirm
 the fork. This time is reflected as validator confirmation time in performance metrics.
 The performance dashboard displays the average of each validator node's confirmation time
-as a time series graph. 
+as a time series graph.