合 GreenPlum 6.26.2版本新特性说明
Tags: GreenPlum新特性pg_buffercachegp_buffercache
简介
GreenPlum 6.26.2已发布,有3个新特性:
The new
optimizer_enable_right_outer_join
server configuration parameter allows you to control whether GPORCA generates right outer joins. In situations in which you are observing poor performance related to right outer joins you may choose to suppress their use. 新增 optimizer_enable_right_outer_join 服务器配置参数,允许控制 GPORCA 是否生成右外连接。在观察到与右外连接相关的性能问题的情况下,可以选择禁止使用它们。12345[gpadmin@gpdb6262 ~]$ gpconfig -s optimizer_enable_right_outer_joinValues on all segments are consistentGUC : optimizer_enable_right_outer_joinMaster value: onSegment value: onVMWware Greenplum includes a new extension -
pg_buffercache
-- which provides a new view to obtain clusterwide shared buffer metrics:gp_buffercache
. 新增了一个扩展 - pg_buffercache -- 提供了获取集群范围共享缓冲区指标的新视图:gp_buffercache。The PgBouncer distributed with Greenplum Database has been updated to version 1.21.0. 随 Greenplum Database 一起分发的 PgBouncer 已更新至版本 1.21.0。
6.26.2 测试环境
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | docker rm -f gpdb6262 docker run -itd --name gpdb6262 -h gpdb6261 \ -p 59431:5432 -p 28089:28080 \ -v /sys/fs/cgroup:/sys/fs/cgroup \ --privileged=true lhrbest/greenplum:6.26.2 \ /usr/sbin/init docker exec -it gpdb6262 bash su - gpadmin gpstart -a gpcc start gpcc status gpstate |
pg_buffercache和gp_buffercache视图
The pg_buffercache
module provides a new view for obtaining cluster-wide shared buffer metrics: gp_buffercache