DB2 import数据导入的skipcount参数使用方法
DB2 import和load比起性能来由于会记录日志，所以通过速度比较慢，并且数据记录太大容易造成事物日志满的问题发生，但有些操作不
DB2 import和load比起性能来由于会记录日志，所以通过速度比较慢，并且数据记录太大容易造成事物日志满的问题发生，但有些操作不得不记日志，所以就不得不适用import,不过其有个COMMITCOUNT选项完全可以避免，来指定import多少条记录即提交，，有助于及时释放日志：
并且由于及时提交了，所以在运行失败了还可以重新在起点继续进行操作：
db2 "import from tab1.ixf of ixf modified by generatedignore COMMITCOUNT 500000 insert into RCDB2.T_CUST_DTL"
上面我设置每导入50W条记录就提交，然而导入中发现索引表空间不足，会话运行失败：
SQL3306N An SQL error "-289" occurred while inserting a row into the table.
SQL0289N Unable to allocate new pages in table space "RCDB2_INDX_01".
SQLSTATE=5701
查询目前已经成功导入的数据量如下：
db2 select count(*) from RCDB2.T_CUST_DTL with ur
1
-----------
5000000
1 record(s) selected.
这个就可以作为重新导入的起点。
db2 "import from tab1.ixf of ixf modified by generatedignore COMMITCOUNT 500000 SKIPCOUNT 5000000 insert into RCDB2.T_CUST_DTL"
另外还有个参数RESTARTCOUNT N何SKIPCOUNT等效， 跳过前N条记录继续import,想当的方便
DB2数据库性能调整和优化(第1、2版) PDF
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