greenplum維護

1.用戶管理

psql -d sea

CREATE DATABASE BI;

CREATE USER ubi WITH PASSWORD 'pwdbi' NOSUPERUSER;

GRANT ALL ON DATABASE BI TO ubi ;

2.表空間管理

--查看seg分佈

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

--查看錶佔用空間大小

select pg_size_pretty(pg_relation_size('faq_logs')) ;

 

--表佔用空間

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;

--索引佔用空間

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.節點恢復

當一臺segment機器壞了，而後機器又恢復了，或某一個segment數據庫停了

只須要運行gprecoverseg，就能夠把segment恢復過來：

gprecoverseg

運行gprecoverseg以後，須要運行gpstate -m查看同步是否都完成了。

 

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

咱們看到數據同步已經完成，可是角色尚未轉換過來，須要使用gprecoverseg -r進行角色切換

 

Recover Segments

gprecoverseg -r