greenplum维护

1.用户管理

psql -d sea

CREATE DATABASE BI;

CREATE USER ubi WITH PASSWORD 'pwdbi' NOSUPERUSER;

GRANT ALL ON DATABASE BI TO ubi ;

2.表空间管理

--查看seg分布

select gp_segment_id,count(1) from faq_logs group by 1;

--查看表占用空间大小

select pg_size_pretty(pg_relation_size('faq_logs')) ;

 

--表占用空间

SELECT relname as name, sotdsize/1024/1024 as size_MB, sotdtoastsize as toast, sotdadditionalsize as other

FROM gp_toolkit.gp_size_of_table_disk as sotd, pg_class

WHERE sotd.sotdoid = pg_class.oid

ORDER BY relname;

--索引占用空间

SELECT soisize/1024/1024 as size_MB, relname as indexname

FROM pg_class, gp_toolkit.gp_size_of_index

WHERE pg_class.oid = gp_size_of_index.soioid

AND pg_class.relkind='i';

 

 

3.节点恢复

当一台segment机器坏了，然后机器又恢复了，或某一个segment数据库停了

只需要运行gprecoverseg，就可以把segment恢复过来：

gprecoverseg

运行gprecoverseg之后，需要运行gpstate -m查看同步是否都完成了。

 

-4 segment(s) configured as mirror(s) are acting as primaries

我们看到数据同步已经完成，但是角色还没有转换过来，需要使用gprecoverseg -r进行角色切换

 

Recover Segments

gprecoverseg -r