USING bitmap (gender); 并行数据装载 Greenplum Database’s parallel file server(gpfdist),可 以达到1小时装载2T数据。 GP的工作负载的资源控制 GP提供了对工作负载和资源控制的功能。 在GP可以建一个资源队列（resource queue)，然后把 用户加入到这个队列中，然后就可以控制： 1. 所有活动的SQL的cost值最多是多少？ 建测试表： create table t1(id int primary key,cn int,name varchar(40)) distributed by (id); create table t2(id int primary key,cn int,name varchar(40)) distributed by (id) ; create table t3(id int primary varchar(40)) distributed by (id) ; insert into t1 select generate_series(1,1000000),generate_series(1,1000000),generate_series (1,1000000); insert into t2 select generate_series(1,1000000),generate_series(1

Greenplum 7 366 What’s New? 367 VMware Greenplum 7 Documentation VMware by Broadcom 14 What Hasn’t Changed With Classic Syntax? 367 What Has Changed? 367 Additional Considerations 370 Examples Using n1-highmem-8 also has 8 vCPUs with 52GB of RAM. There is also a HighCPU instance type that generally isn’t ideal for Greenplum. Like AWS and Azure, the machines with more vCPUs will have more RAM. Network Azure Virtual Machine Type Each VM type has limits on disk throughput so picking a VM that doesn’t have a limit that is too low is essential. Most of Azure is designed for OLTP or Application workloads

with the message Command pg_ctl reports Master gdm instance active because a mirror segment couldn’t be recovered. This was due to the incorrect type of lock being used when creating or altering a resource specified type or query. SELECT * FROM (SELECT * FROM (SELECT c1, SUM(c2) c2 FROM mytbl GROUP BY c1 ) t2 ) t3 GROUP BY c2, ROLLUP((c1)) VMware Greenplum 6 Documentation VMware, Inc 203 ORDER BY 1, 2; pg_resgroup_move_query() function, Greenplum Database returned the error ERROR: group doesn't have enough memory on master. This issue is resolved. 172931886 - Transaction System Greenplum 6.9

with the message Command pg_ctl reports Master gdm instance active because a mirror segment couldn’t be recovered. This was due to the incorrect type of lock being used when creating or altering a resource specified type or query. SELECT * FROM (SELECT * FROM (SELECT c1, SUM(c2) c2 FROM mytbl GROUP BY c1 ) t2 ) t3 GROUP BY c2, ROLLUP((c1)) ORDER BY 1, 2; This issue is resolved. 10561 - Server Greenplum pg_resgroup_move_query() function, Greenplum Database returned the error ERROR: group doesn't have enough memory on master. This issue is resolved. 172931886 - Transaction System Greenplum 6.9

BY clause of an inherited child table. 371934 Resolves an issue where pg_dump, when run with the -t option for an inherited child table, incorrectly dumped its parent table's index. Release 6.26.1 with the message Command pg_ctl reports Master gdm instance active because a mirror segment couldn't be recovered. This was due to the incorrect type of lock being used when creating or altering a resource specified type or query. SELECT * FROM (SELECT * FROM (SELECT c1, SUM(c2) c2 FROM mytbl GROUP BY c1 ) t2 ) t3 GROUP BY c2, ROLLUP((c1)) ORDER BY 1, 2; This issue is resolved. 10561 - Server Greenplum

with the message Command pg_ctl reports Master gdm instance active because a mirror segment couldn't be recovered. This was due to the incorrect type of lock being used when creating or altering a resource specified type or query. SELECT * FROM (SELECT * FROM (SELECT c1, SUM(c2) c2 FROM mytbl GROUP BY c1 ) t2 ) t3 GROUP BY c2, ROLLUP((c1)) ORDER BY 1, 2; This issue is resolved. 10561 - Server Greenplum pg_resgroup_move_query() function, Greenplum Database returned the error ERROR: group doesn't have enough memory on master. This issue is resolved. 172931886 - Transaction System Greenplum 6.9

with the message Command pg_ctl reports Master gdm instance active because a mirror segment couldn't be recovered. This was due to the incorrect type of lock being used when creating or altering a resource specified type or query. SELECT * FROM (SELECT * FROM (SELECT c1, SUM(c2) c2 FROM mytbl GROUP BY c1 ) t2 ) t3 GROUP BY c2, ROLLUP((c1)) ORDER BY 1, 2; This issue is resolved. 10561 - Server Greenplum pg_resgroup_move_query() function, Greenplum Database returned the error ERROR: group doesn't have enough memory on master. This issue is resolved. 172931886 - Transaction System Greenplum 6.9

with the message Command pg_ctl reports Master gdm instance active because a mirror segment couldn’t be recovered. This was due to the incorrect type of lock being used when creating or altering a resource specified type or query. SELECT * FROM (SELECT * FROM (SELECT c1, SUM(c2) c2 FROM mytbl GROUP BY c1 ) t2 ) t3 GROUP BY c2, ROLLUP((c1)) ORDER BY 1, 2; This issue is resolved. 10561 - Server Greenplum pg_resgroup_move_query() function, Greenplum Database returned the error ERROR: group doesn't have enough memory on master. This issue is resolved. 172931886 - Transaction System Greenplum 6.9

with the message Command pg_ctl reports Master gdm instance active because a mirror segment couldn’t be recovered. This was due to the incorrect type of lock being used when creating or altering a resource specified type or query. SELECT * FROM (SELECT * FROM (SELECT c1, SUM(c2) c2 FROM mytbl GROUP BY c1 ) t2 ) t3 GROUP BY c2, ROLLUP((c1)) ORDER BY 1, 2; This issue is resolved. 10561 - Server : Greenplum Database pg_resgroup_move_query() function, Greenplum Database returned the error ERROR: group doesn't have enough memory on master. This issue is resolved. 172931886 - Transaction System : Greenplum 6

with the message Command pg_ctl reports Master gdm instance active because a mirror segment couldn’t be recovered. This was due to the incorrect type of lock being used when creating or altering a resource specified type or query. SELECT * FROM (SELECT * FROM (SELECT c1, SUM(c2) c2 FROM mytbl GROUP BY c1 ) t2 ) t3 GROUP BY c2, ROLLUP((c1)) ORDER BY 1, 2; This issue is resolved. 10561 - Server : Greenplum Database pg_resgroup_move_query() function, Greenplum Database returned the error ERROR: group doesn't have enough memory on master. This issue is resolved. 172931886 - Transaction System : Greenplum 6