update慢如何處理?,update慢處理?

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update慢如何處理?,update慢處理?

update慢:
1.表的pctfree參數設定?
2.執行計畫用索引還是全表掃?
3.SQL語句寫法問題?
4.update慢還是commit慢?
5.更新多少條資料?
6.表是否頻繁update造成片段過多?
7.考慮使用merge?
8.應用問題?
9.資料庫參數設定?

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