zoukankan      html  css  js  c++  java
  • GreenPlum查看表和数据库大小

    表大小

    zwcdb=# select pg_size_pretty(pg_relation_size('gp_test'));
     pg_size_pretty 
    ----------------
     1761 MB
    (1 row)

    表和索引

    zwcdb=# select pg_size_pretty(pg_total_relation_size('gp_test'));
     pg_size_pretty 
    ----------------
     2186 MB

    查看指定数据库

    zwcdb=# select pg_size_pretty(pg_database_size('zwcdb'));
     pg_size_pretty 
    ----------------
     2241 MB

    所有数据库

    zwcdb=# select datname,pg_size_pretty(pg_database_size(datname)) from pg_database;
      datname  | pg_size_pretty 
    -----------+----------------
     zwcdb     | 2241 MB
     postgres  | 47 MB
     template1 | 47 MB
     template0 | 45 MB
     gpperfmon | 67 MB
    (5 rows)

    查看数据分布情况和磁盘空间

    zwcdb=# select gp_segment_id,count(*) from gp_test group by gp_segment_id order by 1;
     gp_segment_id |  count  
    ---------------+---------
                 0 | 5000000
                 1 | 4999999
                 2 | 5000001
                 3 | 5000000
    (4 rows)
    zwcdb=# select dfhostname, dfspace,dfdevice from gp_toolkit.gp_disk_free order by dfhostname;
     dfhostname | dfspace  |  dfdevice  
    ------------+----------+------------
      sdw1      | 12273372 |  /dev/sdb1
      sdw1      | 12273372 |  /dev/sdb1
      sdw2      | 12273404 |  /dev/sdb1
      sdw2      | 12273404 |  /dev/sdb1
  • 相关阅读:
    实现一个简单的ConnectionPool
    并发连接MySQL
    C#里面滥用String造成的性能问题
    String.IndexOf
    C#代码中插入X86汇编
    正确理解Handle对象
    orleans发送广播消息
    log日志方法
    PHP 批量插入数据
    逻辑漏洞小结之SRC篇
  • 原文地址:https://www.cnblogs.com/jiang910/p/10076462.html
Copyright © 2011-2022 走看看