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OPEN_CURSORS(转)

原创 Linux操作系统 作者:tochar 时间:2007-07-27 00:00:00 0 删除 编辑

OPEN_CURSORS

Parameter type

Integer

Default value

50

Parameter class

Dynamic: ALTER SYSTEM

Range of values

1 to 4294967295 (4 GB -1)

OPEN_CURSORS specifies the maximum number of open cursors (handles to private SQL areas) a session can have at once. You can use this parameter to prevent a session from opening an excessive number of cursors. This parameter also constrains the size of the PL/SQL cursor cache which PL/SQL uses to avoid having to reparse as statements are reexecuted by a user.

It is important to set the value of OPEN_CURSORS high enough to prevent your application from running out of open cursors. The number will vary from one application to another. Assuming that a session does not open the number of cursors specified by OPEN_CURSORS, there is no added overhead to setting this value higher than actually needed.


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