4、后记
5、相关参考
Oracle 索引质量分析
Oracle 重建索引的必要性
Oracle重建索引脚本(二)
r index '
|| vindexrec.owner ||'.'
|| vindexrec.index_name
|| ' rebuild'
|| ' parallel nologging compute statistics'
|| ' tablespace '
|| vindexrec.tablespace_name;
EXCEPTION
WHEN resource_busy OR TIMEOUT_ON_RESOURCE
THEN
DBMS_OUTPUT.PUT_LINE (
'alter index - busy and wait for 1 sec');
DBMS_LOCK.sleep (c_trial_interval);
IF trial <= c_max_trial
THEN
GOTO alter_index;
ELSE
DBMS_OUTPUT.PUT_LINE (
'alter index busy and waited - quit after '
|| TO_CHAR (c_max_trial)
|| ' trials');
RAISE;
END IF;
WHEN OTHERS
THEN
DBMS_OUTPUT.PUT_LINE ('alter index err ' || SQLERRM);
RAISE;
END;
END IF;
END IF;
CLOSE csrindexstats;
END LOOP;
DBMS_OUTPUT.PUT_LINE ('Global indices rebuilt: ' || TO_CHAR (vcount));
vcount := 0;
trial := 0;
/* Local indexes */
FOR vindexrec IN csrlocalindexes
LOOP
EXECUTE IMMEDIATE
'analyze index '
|| vindexrec.index_owner||'.'
|| vindexrec.index_name
|| ' partition ('
|| vindexrec.partition_name
|| ') validate structure';
OPEN csrindexstats;
FETCH csrindexstats INTO vindexstats;
IF csrindexstats%FOUND
THEN
IF (vindexstats.height > pmaxheight)
OR ( vindexstats.leafrows > 0
AND vindexstats.leafrowsdeleted > 0
AND (vindexstats.leafrowsdeleted * 100 / vindexstats.leafrows) >
pmaxleafsdeleted)
THEN
vcount := vcount + 1;
DBMS_OUTPUT.PUT_LINE (
'Rebuilding index ' || vindexrec.index_owner||'.'|| vindexrec.index_name || '...');
<>
BEGIN
EXECUTE IMMEDIATE
'alter index '
|| vindexrec.index_owner||'.'
|| vindexrec.index_name
|| ' rebuild'
|| ' partition '
|| vindexrec.partition_name
|| ' parallel nologging compute statistics'
|| ' tablespace '
|| vindexrec.tablespace_name;
EXCEPTION
WHEN resource_busy OR TIMEOUT_ON_RESOURCE
THEN
DBMS_OUTPUT.PUT_LINE (
'alter partitioned index - busy and wait for 1 sec');
DBMS_LOCK.sleep (c_trial_interval);
IF trial <= c_max_trial
THEN
GOTO alter_partitioned_index;
ELSE
DBMS_OUTPUT.PUT_LINE (
'alter partitioned index busy and waited - quit after '
|| TO_CHAR (c_max_trial)
|| ' trials');
RAISE;
END IF;
WHEN OTHERS
THEN
DBMS_OUTPUT.PUT_LINE (
'alter partitioned index err ' || SQLERRM);
RAISE;
END;
END IF;
END IF;
CLOSE csrindexstats;
END LOOP;
DBMS_OUTPUT.PUT_LINE ('Local indices rebuilt: ' || TO_CHAR (vcount));
END;
/
exit;