Collect max_connections metric (#9770)

This will further allow us to expose this metric to users
neondatabase · Nov 15, 2024 · e12628f · e12628f · github-actions · Nov 15, 2024
1 parent 7880c24
commit e12628f
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diff --git a/compute/etc/neon_collector.jsonnet b/compute/etc/neon_collector.jsonnet
@@ -6,6 +6,7 @@
     import 'sql_exporter/compute_backpressure_throttling_seconds.libsonnet',
     import 'sql_exporter/compute_current_lsn.libsonnet',
     import 'sql_exporter/compute_logical_snapshot_files.libsonnet',
+    import 'sql_exporter/compute_max_connections.libsonnet',
     import 'sql_exporter/compute_receive_lsn.libsonnet',
     import 'sql_exporter/compute_subscriptions_count.libsonnet',
     import 'sql_exporter/connection_counts.libsonnet',

diff --git a/compute/etc/sql_exporter/compute_max_connections.libsonnet b/compute/etc/sql_exporter/compute_max_connections.libsonnet
@@ -0,0 +1,10 @@
+{
+  metric_name: 'compute_max_connections',
+  type: 'gauge',
+  help: 'Max connections allowed for Postgres',
+  key_labels: null,
+  values: [
+    'max_connections',
+  ],
+  query: importstr 'sql_exporter/compute_max_connections.sql',
+}
diff --git a/compute/etc/sql_exporter/compute_max_connections.sql b/compute/etc/sql_exporter/compute_max_connections.sql
@@ -0,0 +1 @@
+SELECT current_setting('max_connections') as max_connections;