diff --git a/plugins/postgresql/postgresql_transactions b/plugins/postgresql/postgresql_transactions
index d5d68a0c..c127e633 100755
--- a/plugins/postgresql/postgresql_transactions
+++ b/plugins/postgresql/postgresql_transactions
@@ -29,17 +29,17 @@ if [ "$1" = "config" ]; then
    echo 'graph_category db'
    echo 'graph_info Shows summarized commits and rollbacks in transactions on the PostgreSQL Server.'
    echo 'graph_title PostgreSQL Transactions'
-   echo 'graph_vlabel Number of Commits and Rollbacks'
+   echo 'graph_vlabel Commits and Rollbacks per second'
 
    echo 'commits.label commits'
    echo 'commits.min 0'
-   echo 'commits.type COUNTER'
-   echo 'commits.info Number of transaction commits.'
+   echo 'commits.type DERIVE'
+   echo 'commits.info Number of transaction commits per second.'
 
    echo 'rollbacks.label rollbacks'
    echo 'rollbacks.min 0'
-   echo 'rollbacks.type COUNTER'
-   echo 'rollbacks.info Number of transaction rollbacks.'
+   echo 'rollbacks.type DERIVE'
+   echo 'rollbacks.info Number of transaction rollbacks per second.'
    exit 0
 fi
 psql -h ${dbserver} -U ${dbuser} -tc "SELECT 'commits.value '||SUM(xact_commit)::TEXT||E'\nrollbacks.value '||SUM(xact_rollback)::TEXT FROM pg_stat_database;" --no-align