Add queries for tmp and ready files

sample-config/pgmon-metrics.yml

@@ -116,6 +116,34 @@ metrics:
         FROM pg_stat_io
         GROUP BY backend_type
 
+  temp_files:
+    type: row
+    query:
+      120000: >
+        SELECT count(*) AS count, sum(size) AS size
+        FROM pg_ls_tmpdir()
+        WHERE name LIKE 'pgsql_tmp%'
+      *: >
+        SELECT count(*) AS count, sum(size) AS size
+        FROM pg_ls_dir('base/pgsql_tmp/')
+        WHERE name LIKE 'pgsql_tmp%'
+
+  ready_archive_files:
+    type: value
+    query:
+      120000: >
+        SELECT count(*) AS count
+        FROM pg_ls_archive_statusdir()
+        WHERE name LIKE '%.ready'
+      100000: >
+        SELECT count(*) AS count
+        FROM pg_ls_dir('pg_wal/pgsql_tmp/')
+        WHERE name LIKE '%.ready'
+      *: >
+        SELECT count(*) AS count
+        FROM pg_ls_dir('pg_xlog/pgsql_tmp/')
+        WHERE name LIKE '%.ready'
+
 
   ##
   # Per-database metrics