oracle分区表扩分区 很慢,升级oracle10g 大分区表update变慢
原來使用的數據庫是oracle8.1.7.4? ?這次升級為oracle 10.0.2.4,在導入舊dmp時候明顯能夠感覺到導入數據比較快。
1.可是在正式使用之后,發現啟用一個大表(使用了分區表),在update使用比較慢,語句和索引建的和過去在oracle8i上是完全一致的。這是什么原因?也重建過索引,還是有這個問題。
2.在使用db_links從該數據庫向一個oracle8i傳遞數據時候,很簡單的過程,就是這邊讀然后寫入另一個數據庫,速度也特別慢,這是怎么回事?
請高手指教。
3.另:alert.log出現如下
Sat Aug??4 22:46:37 2012
Thread 1 cannot allocate new log, sequence 819
Checkpoint not complete
Current log# 2 seq# 818 mem# 0: /u01/oradata/jf68/redo02.log
Sat Aug??4 22:46:41 2012
Thread 1 advanced to log sequence 819 (LGWR switch)
Current log# 3 seq# 819 mem# 0: /u01/oradata/jf68/redo03.log
Sat Aug??4 22:47:04 2012
Thread 1 cannot allocate new log, sequence 820
Checkpoint not complete
Current log# 3 seq# 819 mem# 0: /u01/oradata/jf68/redo03.log
Sat Aug??4 22:47:06 2012
Thread 1 advanced to log sequence 820 (LGWR switch)
Current log# 1 seq# 820 mem# 0: /u01/oradata/jf68/redo01.log
Sat Aug??4 22:48:00 2012
Thread 1 cannot allocate new log, sequence 821
Checkpoint not complete
Current log# 1 seq# 820 mem# 0: /u01/oradata/jf68/redo01.log
Sat Aug??4 22:48:08 2012
Thread 1 advanced to log sequence 821 (LGWR switch)
Current log# 2 seq# 821 mem# 0: /u01/oradata/jf68/redo02.log
Sun Aug??5 07:27:12 2012
Thread 1 advanced to log sequence 822 (LGWR switch)
Current log# 3 seq# 822 mem# 0: /u01/oradata/jf68/redo03.log
Sun Aug??5 07:27:50 2012
Thread 1 advanced to log sequence 823 (LGWR switch)
Current log# 1 seq# 823 mem# 0: /u01/oradata/jf68/redo01.log
Sun Aug??5 07:31:20 2012
這是怎么回事?
總結
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