fix: fixed WAL Count metric generation for native Zabbix agent

Author: cuprumtan

mamonsu/plugins/pgsql/xlog.py

@@ -263,15 +263,15 @@ def keys_and_queries(self, template_zabbix):
         result = []
         if LooseVersion(self.VersionPG) < LooseVersion('10'):
             result.append(
-                '{0},$2 $1 -c "{1}"'.format(self.key_count_wall.format('[*]'), Pooler.SQL['count_xlog_files'][0]))
+                '{0},$2 $1 -c "{1}"'.format(self.key_count_wall.format('[*]'), Pooler.SQL['count_wal_files'][0].format('xlog')))
             result.append('{0},$2 $1 -c "{1}"'.format(self.key_wall.format('[*]'), self.query_xlog_lsn_diff))
             result.append(
                 '{0},$2 $1 -c "{1}"'.format("pgsql.replication_lag.sec[*]", self.query_agent_replication_lag.format(self.plugin_config('interval'),
                                                                                                                     'xlog_receive_location',
                                                                                                                     'xlog_replay_location')))
         else:
             result.append(
-                '{0},$2 $1 -c "{1}"'.format(self.key_count_wall.format('[*]'), Pooler.SQL['count_wal_files'][0]))
+                '{0},$2 $1 -c "{1}"'.format(self.key_count_wall.format('[*]'), Pooler.SQL['count_wal_files'][0].format('wal')))
             result.append('{0},$2 $1 -c "{1}"'.format(self.key_wall.format('[*]'), self.query_wal_lsn_diff))
             result.append(
                 '{0},$2 $1 -c "{1}"'.format("pgsql.replication_lag.sec[*]", self.query_agent_replication_lag.format(self.plugin_config('interval'),