diff --git a/playbooks/prod_web.yml b/playbooks/prod_web.yml
index 51bbe80..5b765d3 100755
--- a/playbooks/prod_web.yml
+++ b/playbooks/prod_web.yml
@@ -255,7 +255,7 @@
             hostgroup: tag-nagios-checkpgsql
             # https://rhaas.blogspot.com/2020/02/useless-vacuuming.html
           - name: PSQL Old Xacts
-            command: "check_by_ssh!/usr/lib/nagios/plugins/check_pgsql -H localhost -l nagios -p {{ secret_postgresql_monitoring_password }} -w 2 -c 5 -q 'select count(*)::float from pg_prepared_xacts where age(transaction) > 5000000' -C 1-1000000"
+            command: "check_by_ssh!/usr/lib/nagios/plugins/check_pgsql -H localhost -l nagios -p {{ secret_postgresql_monitoring_password }} -w 2 -c 5 -q 'select count(*)::float from pg_prepared_xacts where age(transaction) > 5000000' -W 500-1000 -C 1000-1000000"
             hostgroup: tag-nagios-checkpgsql
           - name: Unit postgresql.service
             command: check_by_ssh!/usr/local/bin/monitoring-scripts/check_systemd_unit postgresql.service