看到 fastcheck_single 的 makefile 定义，最终是调用pg_regress， 但是按照fastcheck_signle的逻辑，会初始化一个数据库，启动，跑测试用例，这样做一次测试太慢了， 能不能直接用pg_regress连接我已经启动的数据库实例，我试过好像不行，报错如下：
============== running regression test queries ============== test sequence .... fopen /proc/-1/stat : No such file or directory
Could not open: [/mnt/disk01/OpenGauss/openGauss-server/src/test/regress/tmp_check/datanode1/postmaster.pid] for getting Server PID.
Could not get the Resource usage details. Internal error code: -1. regrGetServPid EC: 2. Exit flag status: 0. Could not get the CPU Usage info! Use of uninitialized value $1 in quotemeta at /mnt/disk01/OpenGauss/openGauss-server/src/test/regress/smartmatch.pl line 418, <$RESULT> line 387. Use of uninitialized value $1 in quotemeta at /mnt/disk01/OpenGauss/openGauss-server/src/test/regress/smartmatch.pl line 418, <$RESULT> line 433. Use of uninitialized value $1 in quotemeta at /mnt/disk01/OpenGauss/openGauss-server/src/test/regress/smartmatch.pl line 418, <$RESULT> line 488. Use of uninitialized value $1 in quotemeta at /mnt/disk01/OpenGauss/openGauss-server/src/test/regress/smartmatch.pl line 418, <$RESULT> line 516. Use of uninitialized value $1 in quotemeta at /mnt/disk01/OpenGauss/openGauss-server/src/test/regress/smartmatch.pl line 418, <$RESULT> line 567. Use of uninitialized value $1 in quotemeta at /mnt/disk01/OpenGauss/openGauss-server/src/test/regress/smartmatch.pl line 418, <$RESULT> line 570. Use of uninitialized value $1 in quotemeta at /mnt/disk01/OpenGauss/openGauss-server/src/test/regress/smartmatch.pl line 418, <$RESULT> line 571. Use of uninitialized value $1 in quotemeta at /mnt/disk01/OpenGauss/openGauss-server/src/test/regress/smartmatch.pl line 418, <$RESULT> line 628. Use of uninitialized value $1 in quotemeta at /mnt/disk01/OpenGauss/openGauss-server/src/test/regress/smartmatch.pl line 418, <$RESULT> line 637. FAILED TIME TAKEN: [ 15.025]
====================== 1 of 1 tests failed. Total Time: 15.162499s ======================
有没有人，有同样的需求，请问你是怎么解决的？
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