1，当我用create table创建一个extent size非常巨大的表时，得到：

19836：Extent Size is too large;

maxinum size of an extent id 33554430K

从上面可以看到大小的限制是：33554430K

2，我在导入大量数据的时候出现no more extents.查看错误代码：

:~> finderr 136

-136 ISAM error: no more extents.

The database server needs to add an extent to a table but cannot

do so. Either not enough disk space is available in the dbspace, or thetable has been given the maximum number of extents that is allowed. Thedatabase server administrator can determine the cause as follows:

1. Determine the tblspace number for the table. It is the value in

the partnum column of the systables table for this table.

2. Convert the tblspace number to hexadecimal and extract its

most-significant 2 digits (the high-order byte). This chunk number indicates where the table resides.

3. Use the tbstat or onstat utility -t option to find out disk

usage for this table. Note particularly the values reported for npages (disk pages available), nused (disk pages used), and nextns (number of extents).

If nused is less than npages, and nextns is large (over 200), the table

has too many extents. The upper limit of extents per table is between 200and 50. The limit varies with the table definition and thedisk-page size in use. Reallocate the table using fewer, largerextents. Unload the table data to a flat file. Drop the table.Re-create the table, specifying a first-extent size sufficient to holdall its current data and a next-extent size between one-fourth andone-sixteenth its current size. Then reload the data into the table.

If nextns is small or the difference between npages and nused is less

than the size of the next-extent size for the table, not enough diskspace is available in the dbspace where the table resides. Use thechunk number from step 2 and the ON-Monitor or ON-Monitor Chunksdisplay to determine the dbspace, then add a new chunk to thatdbspace.

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