webman + GatewayWorker + mariadb 报错

webman 那里写了个接口 ，配置好了数据库，gateway-work没写代码 ，不到一分钟就报错

2022-06-24 19:34:16 pid:38372 Workerman[start.php] start in DEBUG mode
2022-06-24 19:35:12 pid:38869 Worker[38869] process terminated with ERROR: E_ERROR "Uncaught PDOException: SQLSTATE[08004] [1040] Too many connections in /root/webman/vendor/illuminate/database/Connectors/Connector.php:70
Stack trace:
#0 /root/webman/vendor/illuminate/database/Connectors/Connector.php(70): PDO->__construct()
#1 /root/webman/vendor/illuminate/database/Connectors/Connector.php(46): Illuminate\Database\Connectors\Connector->createPdoConnection()
#2 /root/webman/vendor/illuminate/database/Connectors/MySqlConnector.php(24): Illuminate\Database\Connectors\Connector->createConnection()
#3 /root/webman/vendor/illuminate/database/Connectors/ConnectionFactory.php(184): Illuminate\Database\Connectors\MySqlConnector->connect()
#4 [internal function]: Illuminate\Database\Connectors\ConnectionFactory->Illuminate\Database\Connectors\{closure}()
#5 /root/webman/vendor/illuminate/database/Connection.php(1168): call_user_func()
#6 /root/webman/vendor/illuminate/database/Connection.php(1204): Illuminate\Database\Connection->getPdo()
#7 /root/webman/vendor/illuminate/database/Connection.php(485): Illuminate\Database\Connection->getReadPdo()
#8 /root/webman/vendor/illuminate/database/Connection.php(413): Illuminate\Database\Connection->getPdoForSelect()
#9 /root/webman/vendor/illuminate/database/Connection.php(752): Illuminate\Database\Connection->Illuminate\Database\{closure}()
#10 /root/webman/vendor/illuminate/database/Connection.php(719): Illuminate\Database\Connection->runQueryCallback()
#11 /root/webman/vendor/illuminate/database/Connection.php(421): Illuminate\Database\Connection->run()
#12 /root/webman/vendor/workerman/webman-framework/src/support/bootstrap/LaravelDb.php(79): Illuminate\Database\Connection->select()
#13 /root/webman/vendor/workerman/workerman/Events/Select.php(233): support\bootstrap\LaravelDb::support\bootstrap\{closure}()
#14 /root/webman/vendor/workerman/workerman/Events/Select.php(283): Workerman\Events\Select->tick()
#15 /root/webman/vendor/workerman/workerman/Worker.php(2437): Workerman\Events\Select->loop()
#16 /root/webman/vendor/workerman/workerman/Worker.php(1557): Workerman\Worker->run()
#17 /root/webman/vendor/workerman/workerman/Worker.php(1399): Workerman\Worker::forkOneWorkerForLinux()
#18 /root/webman/vendor/workerman/workerman/Worker.php(1373): Workerman\Worker::forkWorkersForLinux()
#19 /root/webman/vendor/workerman/workerman/Worker.php(550): Workerman\Worker::forkWorkers()
#20 /root/webman/start.php(112): Workerman\Worker::runAll()
#21 {main}

Next Illuminate\Database\QueryException: SQLSTATE[08004] [1040] Too many connections (SQL: select 1) in /root/webman/vendor/illuminate/database/Connection.php:759
Stack trace:
#0 /root/webman/vendor/illuminate/database/Connection.php(719): Illuminate\Database\Connection->runQueryCallback()
#1 /root/webman/vendor/illuminate/database/Connection.php(421): Illuminate\Database\Connection->run()
#2 /root/webman/vendor/workerman/webman-framework/src/support/bootstrap/LaravelDb.php(79): Illuminate\Database\Connection->select()
#3 /root/webman/vendor/workerman/workerman/Events/Select.php(233): support\bootstrap\LaravelDb::support\bootstrap\{closure}()
#4 /root/webman/vendor/workerman/workerman/Events/Select.php(283): Workerman\Events\Select->tick()
#5 /root/webman/vendor/workerman/workerman/Worker.php(2437): Workerman\Events\Select->loop()
#6 /root/webman/vendor/workerman/workerman/Worker.php(1557): Workerman\Worker->run()
#7 /root/webman/vendor/workerman/workerman/Worker.php(1399): Workerman\Worker::forkOneWorkerForLinux()
#8 /root/webman/vendor/workerman/workerman/Worker.php(1373): Workerman\Worker::forkWorkersForLinux()
#9 /root/webman/vendor/workerman/workerman/Worker.php(550): Workerman\Worker::forkWorkers()
#10 /root/webman/start.php(112): Workerman\Worker::runAll()
#11 {main}
  thrown in /root/webman/vendor/illuminate/database/Connection.php on line 759"

webman 启动后每个每个进程会主动连数据库，比如你启动100个进程，就会预先建立100个连接。要么你进程开太多了，要么数据库连接数上限太少了

1、查看GatewayWorker 数据库连接数量 + webman 进程数量（连接数） = 总共使用数据库连接数
2、查看mysql 服务器默认配置是多少连接数，你自己改一下配置文件。