oracle pctfree 修改,[转]oracle性能调整—PCTFREE、PCTUSED
/* Get the name of the table with migrated rows */accept table_name prompt ’Enter the name of the table with migrated rows: ’/* Clean up from last execution */set echo offdrop table migrated_rows;drop
/* Get the name of the table with migrated rows */
accept table_name prompt ’Enter the name of the table with migrated rows: ’
/* Clean up from last execution */
set echo off
drop table migrated_rows;
drop table chained_rows;
/* Create the CHAINED_ROWS table */
@?/rdbms/admin/utlchain
set echo on
spool fix_mig
/* List the chained & migrated rows */
analyze table &table_name list chained rows;
/* Copy the chained/migrated rows to another table */
create table migrated_rows as
select orig.* from &table_name orig, chained_rows cr
where orig.rowid = cr.head_rowid
and cr.table_name = upper(’&table_name’);
/* Delete the chained/migrated rows from the original table */
delete from &table_name
where rowid in ( select head_rowid from chained_rows );
/* Copy the chained/migrated rows back into the original table */
insert into &table_name select * from migrated_rows;
spool off
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