gp_session_role $ cat restart_pgbouncer.sh ps ax|grep -w pgbouncer|grep -vw grep|awk '{system("kill -9 "$1)}' pgbouncer -v -R -d pgbouncer.ini 计算实例：Instance 在 GP 系统中，Instance 才是承 Windows 隐藏符号等特殊不可见字符的出现，也不能随意修改初始化时自动生成的记 录，错误的修改可能会导致数据库无法访问，甚至出现无法执行 gpstop 等尴尬情况， 那时只能使用 pg_ctl 或者 kill -9 才能停止数据库，这是不应该发生的。 限制并发连接数量 为了限制对 GP 数据库系统的并发访问数量，可以通过配置 Server 参数 max_connections ROLE 会收到如下信息： ERROR: canceling statement due to user request: "因系统维护暂停使用" 注意：尽可能避免使用操作系统的KILL命令来杀死GP数据库的任何进程，当然，有时 如果万不得已，在尽量确保安全的情况下，也不是绝对不能使用，但专业技术支持可能 会不支持这种擅自操作导致的严重后果，所以，如有必要，请联系专业技术支持人员。

外部表中读取数据并写⼊⽬的 greenplum 集群 FAQs 创建好数据仓库之后怎么连接到UDW？ UDW⽀持从mysql导⼊数据吗？ HDFS/Hive与UDW之间可以导⼊导出数据吗？ UDW中怎么kill掉正在执⾏的SQL语句？ 如何通过外⽹访问UDW？ 节点扩容时数量有没有什么限制？ 数据仓库价格 数据仓库价格 ⽬录 Greenplum数据仓库 UDW Copyright © 2012-2021 ⽤sqoop实现hdfs和udw直接的数据导⼊导出，使⽤⽅法请参考：hdfs和hive中数据导⼊导出到udw 2. 创建hdfs外部表，使⽤⽅法请参考：创建hdfs外部表 UDW中怎么 中怎么kill掉正在执⾏的 掉正在执⾏的SQL语句？ 语句？ FAQs Greenplum数据仓库 UDW Copyright © 2012-2021 UCloud 优刻得 203/206 查看哪些SQL语句正在执⾏，语句如下：

Box CGroup backend backend backend CGroup backend backend backend CGroup Public CGroup Kill –USR2 2016Postgres中国用户大会 未来规划 满足客户需求！ 列存优化 – 某些场景下提高数倍性能 CPU优化 – 对GP执行器的静态编译优化 流式备份 – 实时的物理备份

extra step and improves performance. VMware Greenplum 6 Documentation VMware by Broadcom 654 $ kill 3456 Troubleshooting gpfdist The segments access gpfdist at runtime. Ensure that the Greenplum segment background: --First find its process id: ps ax | grep gpfdist --Then stop the process, for example: kill 3456 See Also gpload, CREATE EXTERNAL TABLE gpload Runs a load job as defined in a YAML formatted master host. Important VMware Greenplum 6 Documentation VMware by Broadcom 1038 Issuing a kill -9 or kill -11 can introduce database corruption and prevent root cause analysis from being performed.

grep gpfdist Then stop the process, for example (where 3456 is the process ID in this example): $ kill 3456 Troubleshooting gpfdist The segments access gpfdist at runtime. Ensure that the Greenplum segment background: –First find its process id: ps ax | grep gpfdist –Then stop the process, for example: kill 3456 See Also gpload, CREATE EXTERNAL TABLE gpload Runs a load job as defined in a YAML formatted master host. Important: Do not issue a kill command to end any Postgres process. Instead, use the database command pg_cancel_backend(). Issuing a kill -9 or kill -11 can introduce database corruption

grep gpfdist Then stop the process, for example (where 3456 is the process ID in this example): $ kill 3456 avoids the extra step and improves performance. VMware Greenplum 6 Documentation VMware, Inc background: –First find its process id: ps ax | grep gpfdist –Then stop the process, for example: kill 3456 See Also gpload, CREATE EXTERNAL TABLE gpload Runs a load job as defined in a YAML formatted host. Important Do not issue a kill command to end any Postgres process. Instead, use the VMware Greenplum 6 Documentation VMware, Inc 1025 Issuing a kill -9 or kill -11 can introduce database corruption

grep gpfdist Then stop the process, for example (where 3456 is the process ID in this example): $ kill 3456 Troubleshooting gpfdist The segments access gpfdist at runtime. Ensure that the Greenplum segment background: –First find its process id: ps ax | grep gpfdist –Then stop the process, for example: kill 3456 VMware Tanzu Greenplum 6 Documentation VMware, Inc 645 See Also gpload, CREATE EXTERNAL TABLE master host. Important: Do not issue a kill command to end any Postgres process. Instead, use the database command pg_cancel_backend(). Issuing a kill -9 or kill -11 can introduce database corruption

grep gpfdist Then stop the process, for example (where 3456 is the process ID in this example): $ kill 3456 Troubleshooting gpfdist The segments access gpfdist at runtime. Ensure that the Greenplum segment VMware Tanzu Greenplum 6 Documentation VMware, Inc. 643 --Then stop the process, for example: kill 3456 See Also gpload, CREATE EXTERNAL TABLE gpload Runs a load job as defined in a YAML formatted master host. Important: Do not issue a kill command to end any Postgres process. Instead, use the database command pg_cancel_backend(). Issuing a kill -9 or kill -11 can introduce database corruption

avoids the extra step and improves performance. VMware Greenplum 6 Documentation VMware, Inc. 625 $ kill 3456 Troubleshooting gpfdist The segments access gpfdist at runtime. Ensure that the Greenplum segment background: --First find its process id: ps ax | grep gpfdist --Then stop the process, for example: kill 3456 See Also gpload, CREATE EXTERNAL TABLE gpload Runs a load job as defined in a YAML formatted Database master host. Important VMware Greenplum 6 Documentation VMware, Inc. 1007 Issuing a kill -9 or kill -11 can introduce database corruption and prevent root cause analysis from being performed.

catalogs to avoid catalog bloat and the need to run VACUUM FULL on catalog tables. Never issue a kill command against VACUUM on catalog tables. See Managing Bloat in a Database. Loading Maximize the located in the $GPHOME/bin directory on your Greenplum Database master host. Important: Do not issue a kill command to end any Postgres process. Instead, use the database command pg_cancel_backend(). VMware perform maintenance or administrative tasks without affecting data on the segments. Issuing a kill -9 or kill -11 can introduce database corruption and prevent root cause analysis from being performed.