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找出需要分析的表以及delete超过阀值(你设定)的表

原创 Linux操作系统 作者:lsm_3036 时间:2011-08-24 14:07:00 0 删除 编辑

自己编写的一个小脚本,找出没有被analyzed的表,插入条数top 5,删除条数 top 5的表,以及delete 超过阀值的表,该脚本对ORACLE性能没有多大影响,放心使用吧。

注意,每当我们对表搜集一次统计信息之后,如果该表没有insert,delete操作,此脚本将无法查询出任何条目

 


create or replace Function tablespace(segment_owner varchar2, segment_name varchar2)
    return varchar2 as
    total_blocks  number;
    total_bytes   number;
    unused_blocks number;
    unused_bytes  number;
    luefi         number;
    luebi         number;
    lub           number;
  begin
    dbms_space.unused_space(segment_name              => segment_name,
                            segment_owner             => segment_owner,
                            segment_type              => 'TABLE',
                            total_blocks              => total_blocks,
                            total_bytes               => total_bytes,
                            unused_blocks             => unused_blocks,
                            unused_bytes              => unused_bytes,
                            last_used_extent_file_id  => luefi,
                            last_used_extent_block_id => luebi,
                            last_used_block           => lub);
    return segment_owner || '.' || segment_name || ' has ' || total_blocks || ' blocks,' ||(total_blocks -
                                                                                            unused_blocks) || ' used,' || unused_blocks || ' unused.';
  end tablespace;

运行下面脚本之前需要创建上面的函数


declare
                     top_n_inserts number :=5;
                     top_n_deletes number :=5;
                     top_n_updates number :=5;
                     delete_rate   number :=20;
    cursor topinsert is
      select *
        from (select a.table_owner, a.table_name, sum(a.inserts) inserts
                from dba_tab_modifications a, dba_tables b
               where a.table_name = b.table_name
                 and table_owner not in
                     ('SYS', 'SYSTEM', 'SYSMAN', 'DMSYS', 'OLAPSYS', 'XDB',
                      'EXFSYS', 'CTXSYS', 'WMSYS', 'DBSNMP', 'ORDSYS',
                      'OUTLN', 'TSMSYS', 'MDSYS')
                 and inserts > 0
               group by a.table_owner, a.table_name
               order by inserts desc)
       where rownum <= top_n_inserts;
    -----select top_n_updates---------------
    cursor topupdate is
      select *
        from (select a.table_owner, a.table_name, sum(a.updates) updates
                from dba_tab_modifications a, dba_tables b
               where a.table_name = b.table_name
                 and table_owner not in
                     ('SYS', 'SYSTEM', 'SYSMAN', 'DMSYS', 'OLAPSYS', 'XDB',
                      'EXFSYS', 'CTXSYS', 'WMSYS', 'DBSNMP', 'ORDSYS',
                      'OUTLN', 'TSMSYS', 'MDSYS')
                 and updates > 0
               group by a.table_owner, a.table_name
               order by updates desc)
       where rownum <= top_n_updates;
    ----select top_n_deletes----------------
    cursor topdelete is
      select *
        from (select a.table_owner, a.table_name, sum(a.deletes) deletes
                from dba_tab_modifications a, dba_tables b
               where a.table_name = b.table_name
                 and a.table_owner not in
                     ('SYS', 'SYSTEM', 'SYSMAN', 'DMSYS', 'OLAPSYS', 'XDB',
                      'EXFSYS', 'CTXSYS', 'WMSYS', 'DBSNMP', 'ORDSYS',
                      'OUTLN', 'TSMSYS', 'MDSYS')
                 and deletes > 0
               group by a.table_owner, a.table_name
               order by deletes desc)
       where rownum <= top_n_deletes;
    ----select the detail information about the table------------
    cursor monitor is
      select b.owner, b.table_name, inserts, deletes, num_rows
        from (select table_owner,
                     table_name,
                     sum(inserts) inserts,
                     sum(updates) updates,
                     sum(deletes) deletes
                from dba_tab_modifications
               group by table_owner, table_name) a,
             dba_tables b
       where a.table_owner = b.owner
         and a.table_name = b.table_name
         and b.owner not in ('SYS', 'SYSTEM', 'SYSMAN', 'DMSYS', 'OLAPSYS',
              'XDB', 'EXFSYS', 'CTXSYS', 'WMSYS', 'DBSNMP',
              'ORDSYS', 'OUTLN', 'TSMSYS', 'MDSYS')
         and b.last_analyzed is not null;
    ----select the unanalyzed table---------------
    cursor nullmonitor is
      select owner, table_name
        from dba_tables
       where owner not in ('SYS', 'SYSTEM', 'SYSMAN', 'DMSYS', 'OLAPSYS',
              'XDB', 'EXFSYS', 'CTXSYS', 'WMSYS', 'DBSNMP',
              'ORDSYS', 'OUTLN', 'TSMSYS', 'MDSYS')
         and last_analyzed is null;
  begin
    dbms_output.enable(1000000);
    ----flush the monitorring information into the dba_tab_modifications
    DBMS_STATS.FLUSH_DATABASE_MONITORING_INFO;
    ----display the unanalyzed table--------------
    dbms_output.put_line('- - - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -');
  
    dbms_output.put_line('Unalalyzed tables:');
    for v_null in nullmonitor loop
      dbms_output.put_line(v_null.owner || '.' || v_null.table_name ||
                           ' has not been analyzed,consider gathering statistics');
    end loop;
    ----display the top_n_insert information-------------------
    dbms_output.put_line('- - - - - - - - - - - - - - - - - - - - -  - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -' );
    dbms_output.put_line('Top ' || top_n_inserts || ' Inserts:');
    for v_topinsert in topinsert loop
      dbms_output.put_line(tablespace(v_topinsert.table_owner,
                                      v_topinsert.table_name) ||
                           ' Inserted ' || v_topinsert.inserts || ' rows,' ||
                           'consider gathering statistics');
    end loop;
    ----display the top_n_update informaation----------------
    dbms_output.put_line('- - - - - - - - - - - - - - - - - - - - - - -  - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -');
    dbms_output.put_line('Top ' || top_n_updates || ' Updates:');
    for v_topupdate in topupdate loop
      dbms_output.put_line(tablespace(v_topupdate.table_owner,
                                      v_topupdate.table_name) ||
                           ' Updated ' || v_topupdate.updates || ' rows,' ||
                           'consider gathering statistics');
    end loop;
    ---display the top_n_deletes information-----------------
    dbms_output.put_line('- - - - - - - - - - - - - - - - - - - - -  - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -');
    dbms_output.put_line('Top ' || top_n_deletes || ' Deletes:');
    for v_topdelete in topdelete loop
      dbms_output.put_line(tablespace(v_topdelete.table_owner,
                                      v_topdelete.table_name) ||
                           ' Deleted ' || v_topdelete.deletes || ' rows,' ||
                           'consider gathering statistics');
    end loop;
    ---display the table which should be shrinked--------------
    dbms_output.put_line('- - - - - - - - - - - - - - - - - - -  - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -');
    dbms_output.put_line('Over the Delete_Rate ' || delete_rate || '%:');
    for v_monitor in monitor loop
      if (v_monitor.deletes - v_monitor.inserts) > 0 then
        if (v_monitor.num_rows + v_monitor.inserts - v_monitor.deletes) = 0 then
          dbms_output.put_line(tablespace(v_monitor.owner,
                                          v_monitor.table_name) || ' Has ' ||
                               (v_monitor.num_rows + v_monitor.inserts -
                                v_monitor.deletes) || ' rows now,' ||
                               (v_monitor.deletes - v_monitor.inserts) ||
                               ' rows deleted.consider  shirnking the table!!! ');
        elsif (v_monitor.deletes - v_monitor.inserts) /
              (v_monitor.num_rows + v_monitor.inserts - v_monitor.deletes) >=
              delete_rate / 100 then
          dbms_output.put_line(tablespace(v_monitor.owner,
                                          v_monitor.table_name) || ' Has ' ||
                               (v_monitor.num_rows + v_monitor.inserts -
                                v_monitor.deletes) || ' rows now,' ||
                               round((v_monitor.deletes -
                                     v_monitor.inserts) /
                                     (v_monitor.num_rows +
                                     v_monitor.inserts -
                                     v_monitor.deletes),
                                     4) * 100 ||
                               '% of the table has been deleted' ||
                               ',consider shirnking the table!!!');
        end if;
      else
        if (v_monitor.deletes) / (v_monitor.inserts + v_monitor.num_rows) >=
           (delete_rate / 100) then
          dbms_output.put_line(tablespace(v_monitor.owner,
                                          v_monitor.table_name) || ' Has ' ||
                               (v_monitor.num_rows + v_monitor.inserts -
                                v_monitor.deletes) || ' rows now,' ||
                               round((v_monitor.deletes) /
                                     (v_monitor.num_rows +
                                     v_monitor.inserts),
                                     4) * 100 ||
                               '% of the table has been deleted' ||
                               ',consider shirnking the table!!!');
        end if;
      end if;
    end loop;
     dbms_output.put_line('- - - - - - - - - - - - - - - - - - -  - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -');
  end;
/

 

例子:
SQL> /
- - - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Unalalyzed tables:
ROBINSON.CONS has not been analyzed,consider gathering statistics
ROBINSON.CONS1 has not been analyzed,consider gathering statistics
- - - - - - - - - - - - - - - - - - - - -  - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Top 5 Inserts:
- - - - - - - - - - - - - - - - - - - - - - -  - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Top 5 Updates:
- - - - - - - - - - - - - - - - - - - - -  - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Top 5 Deletes:
ROBINSON.TEST has 768 blocks,707 used,61 unused. Deleted 49970 rows,consider gathering statistics
- - - - - - - - - - - - - - - - - - -  - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Over the Delete_Rate 20%:
ROBINSON.TEST has 768 blocks,707 used,61 unused. Has 0 rows now,49970 rows deleted.consider  shirnking the table!!!

PL/SQL procedure successfully completed

 可以刻使用下面的脚本,下面这个脚本不需要运行上面的函数

 

 set serveroutput on
declare
                     top_n_inserts number :=5;
                     top_n_deletes number :=5;
                     top_n_updates number :=5;
                     delete_rate   number :=20;
    cursor topinsert is
      select *
        from (select a.table_owner, a.table_name, sum(a.inserts) inserts,b.num_rows
                from dba_tab_modifications a, dba_tables b
               where a.table_name = b.table_name
                 and table_owner not in
                     ('SYS', 'SYSTEM', 'SYSMAN', 'DMSYS', 'OLAPSYS', 'XDB',
                      'EXFSYS', 'CTXSYS', 'WMSYS', 'DBSNMP', 'ORDSYS',
                      'OUTLN', 'TSMSYS', 'MDSYS')
                 and inserts > 0
               group by a.table_owner, a.table_name,b.num_rows
               order by inserts desc)
       where rownum <= top_n_inserts;
    -----select top_n_updates---------------
    cursor topupdate is
      select *
        from (select a.table_owner, a.table_name, sum(a.updates) updates,b.num_rows
                from dba_tab_modifications a, dba_tables b
               where a.table_name = b.table_name
                 and table_owner not in
                     ('SYS', 'SYSTEM', 'SYSMAN', 'DMSYS', 'OLAPSYS', 'XDB',
                      'EXFSYS', 'CTXSYS', 'WMSYS', 'DBSNMP', 'ORDSYS',
                      'OUTLN', 'TSMSYS', 'MDSYS')
                 and updates > 0
               group by a.table_owner, a.table_name,b.num_rows
               order by updates desc)
       where rownum <= top_n_updates;
    ----select top_n_deletes----------------
    cursor topdelete is
      select *
        from (select a.table_owner, a.table_name, sum(a.deletes) deletes,b.num_rows
                from dba_tab_modifications a, dba_tables b
               where a.table_name = b.table_name
                 and a.table_owner not in
                     ('SYS', 'SYSTEM', 'SYSMAN', 'DMSYS', 'OLAPSYS', 'XDB',
                      'EXFSYS', 'CTXSYS', 'WMSYS', 'DBSNMP', 'ORDSYS',
                      'OUTLN', 'TSMSYS', 'MDSYS')
                 and deletes > 0
               group by a.table_owner, a.table_name,b.num_rows
               order by deletes desc)
       where rownum <= top_n_deletes;
    ----select the detail information about the table------------
    cursor monitor is
      select b.owner, b.table_name, inserts, deletes, num_rows
        from (select table_owner,
                     table_name,
                     sum(inserts) inserts,
                     sum(updates) updates,
                     sum(deletes) deletes
                from dba_tab_modifications
               group by table_owner, table_name) a,
             dba_tables b
       where a.table_owner = b.owner
         and a.table_name = b.table_name
         and b.owner not in ('SYS', 'SYSTEM', 'SYSMAN', 'DMSYS', 'OLAPSYS',
              'XDB', 'EXFSYS', 'CTXSYS', 'WMSYS', 'DBSNMP',
              'ORDSYS', 'OUTLN', 'TSMSYS', 'MDSYS')
         and b.last_analyzed is not null;
    ----select the unanalyzed table---------------
    cursor nullmonitor is
      select owner, table_name
        from dba_tables
       where owner not in ('SYS', 'SYSTEM', 'SYSMAN', 'DMSYS', 'OLAPSYS',
              'XDB', 'EXFSYS', 'CTXSYS', 'WMSYS', 'DBSNMP',
              'ORDSYS', 'OUTLN', 'TSMSYS', 'MDSYS')
         and last_analyzed is null;
  begin
    dbms_output.enable(1000000);
    ----flush the monitorring information into the dba_tab_modifications
    DBMS_STATS.FLUSH_DATABASE_MONITORING_INFO;
    ----display the unanalyzed table--------------
    dbms_output.put_line('- - - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -');
  
    dbms_output.put_line('Unalalyzed tables:');
    for v_null in nullmonitor loop
      dbms_output.put_line(v_null.owner || '.' || v_null.table_name ||
                           ' has not been analyzed,consider gathering statistics');
    end loop;
    ----display the top_n_insert information-------------------
    dbms_output.put_line('- - - - - - - - - - - - - - - - - - - - -  - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -' );
    dbms_output.put_line('Top ' || top_n_inserts || ' Inserts:');
    for v_topinsert in topinsert loop
      dbms_output.put_line(v_topinsert.table_owner || '.' || v_topinsert.table_name || ' once has ' || v_topinsert.num_rows || ' rows, ' ||
                           'till now inserted ' || v_topinsert.inserts || ' rows,' ||
                           'consider gathering statistics');
    end loop;
    ----display the top_n_update informaation----------------
    dbms_output.put_line('- - - - - - - - - - - - - - - - - - - - - - -  - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -');
    dbms_output.put_line('Top ' || top_n_updates || ' Updates:');
    for v_topupdate in topupdate loop
      dbms_output.put_line(v_topupdate.table_owner || '.' || v_topupdate.table_name || ' once has ' || v_topupdate.num_rows || ' rows, ' ||
                           'till now updated ' || v_topupdate.updates || ' rows,' ||
                           'consider gathering statistics');
    end loop;
    ---display the top_n_deletes information-----------------
    dbms_output.put_line('- - - - - - - - - - - - - - - - - - - - -  - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -');
    dbms_output.put_line('Top ' || top_n_deletes || ' Deletes:');
    for v_topdelete in topdelete loop
      dbms_output.put_line(v_topdelete.table_owner || '.' || v_topdelete.table_name || ' once has ' || v_topdelete.num_rows || ' rows, ' ||
                           'till now deleted ' || v_topdelete.deletes || ' rows,' ||
                           'consider gathering statistics');
    end loop;
    ---display the table which should be shrinked--------------
    dbms_output.put_line('- - - - - - - - - - - - - - - - - - -  - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -');
    dbms_output.put_line('Over the Delete_Rate ' || delete_rate || '%:');
    for v_monitor in monitor loop
      if (v_monitor.deletes - v_monitor.inserts) > 0 then
        if (v_monitor.num_rows + v_monitor.inserts - v_monitor.deletes) = 0 then
          dbms_output.put_line(v_monitor.owner || '.' ||
                                          v_monitor.table_name || ' Has ' ||
                               (v_monitor.num_rows + v_monitor.inserts -
                                v_monitor.deletes) || ' rows now,' ||
                               (v_monitor.deletes - v_monitor.inserts) ||
                               ' rows deleted.consider  shirnking the table!!! ');
        elsif (v_monitor.deletes - v_monitor.inserts) /
              (v_monitor.num_rows + v_monitor.inserts - v_monitor.deletes) >=
              delete_rate / 100 then
          dbms_output.put_line(v_monitor.owner || '.' ||
                                          v_monitor.table_name || ' Has ' ||
                               (v_monitor.num_rows + v_monitor.inserts -
                                v_monitor.deletes) || ' rows now,' ||
                               round((v_monitor.deletes -
                                     v_monitor.inserts) /
                                     (v_monitor.num_rows +
                                     v_monitor.inserts -
                                     v_monitor.deletes),
                                     4) * 100 ||
                               '% of the table has been deleted' ||
                               ',consider shirnking the table!!!');
        end if;
      else
        if (v_monitor.deletes) / (v_monitor.inserts + v_monitor.num_rows) >=
           (delete_rate / 100) then
          dbms_output.put_line(v_monitor.owner || '.' ||
                                          v_monitor.table_name || ' Has ' ||
                               (v_monitor.num_rows + v_monitor.inserts -
                                v_monitor.deletes) || ' rows now,' ||
                               round((v_monitor.deletes) /
                                     (v_monitor.num_rows +
                                     v_monitor.inserts),
                                     4) * 100 ||
                               '% of the table has been deleted' ||
                               ',consider shirnking the table!!!');
        end if;
      end if;
    end loop;
     dbms_output.put_line('- - - - - - - - - - - - - - - - - - -  - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -');
  end;
/

例子:

SQL> /
- - - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Unalalyzed tables:
ROBINSON.CONS has not been analyzed,consider gathering statistics
ROBINSON.CONS1 has not been analyzed,consider gathering statistics
- - - - - - - - - - - - - - - - - - - - -  - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Top 5 Inserts:
ROBINSON.TEST once has 49970 rows, till now inserted 49969 rows,consider gathering statistics
- - - - - - - - - - - - - - - - - - - - - - -  - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Top 5 Updates:
- - - - - - - - - - - - - - - - - - - - -  - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Top 5 Deletes:
ROBINSON.TEST once has 49970 rows, till now deleted 49970 rows,consider gathering statistics
- - - - - - - - - - - - - - - - - - -  - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Over the Delete_Rate 20%:
- - - - - - - - - - - - - - - - - - -  - - - - - - - - - - -  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

PL/SQL procedure successfully completed

 

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