NLBUFF parameter: Difference between revisions
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{{Template:NLBUFF parameter subtitle}} | |||
==Summary== | ==Summary== | ||
<dl> | <dl> | ||
| Line 8: | Line 10: | ||
<dd> | <dd> | ||
<p>Cannot be reset</p> | <p>Cannot be reset</p> | ||
<p>In z/OS, the NLBUFF parameter can be set explicitly only via the PARM field in the EXEC card. See the | <p>In z/OS, the <var>NLBUFF</var> parameter can be set explicitly only via the PARM field in the EXEC card. See [[Defining the runtime environment (CCAIN)#Specifying EXEC statement parameters|Specifying EXEC statement parameters]].</p> | ||
<p>In z/VM, the NLBUFF parameter is stacked in the EXEC that issues all the FILEDEFs.</p> | <p>In z/VM, the <var>NLBUFF</var> parameter is stacked in the EXEC that issues all the FILEDEFs.</p> | ||
<dt>Related products | <dt>Related products | ||
<dd>All | <dd>All | ||
<dt>Introduced | <dt>Introduced | ||
<dd><var class="product">Model 204 V6.1</var> | <dd><var class="product">Model 204 V6.1</var> | ||
</dl> | </dl> | ||
==Description== | ==Description== | ||
<p>The number of buffers allocated for writing to CCAJLOG when a CCAJLOG DD is defined. The size of each buffer is equal to the BLKSIZE defined for the associated data set. A buffer is written only when it fills.</p> | <p> | ||
<p>If the CCAJLOG block size is small, you might need to increase the value to improve performance. Rocket Software recommends setting the CCAJLOG block size as large as possible and using the NLBUFF default setting.</p> | The number of buffers allocated for writing to <var>[[Tracking_system_activity_(CCAJRNL,_CCAAUDIT,_CCAJLOG)#Using_the_CCAJLOG_data_set|CCAJLOG]]</var> when a CCAJLOG DD is defined. The size of each buffer is equal to the <code>BLKSIZE</code> defined for the associated data set. A buffer is written only when it fills.</p> | ||
<p> | |||
If the CCAJLOG block size is small, you might need to increase the value to improve performance. Rocket Software recommends setting the CCAJLOG block size as large as possible and using the <var>NLBUFF</var> default setting.</p> | |||
[[Category:System parameters]] | [[Category:System parameters]] | ||
[[Category:Parameters]] | [[Category:Parameters]] | ||
Latest revision as of 13:11, 25 August 2015
Number of CCAJLOG buffers
Summary
- Default value
- 5
- Parameter type
- System
- Where set
-
Cannot be reset
In z/OS, the NLBUFF parameter can be set explicitly only via the PARM field in the EXEC card. See Specifying EXEC statement parameters.
In z/VM, the NLBUFF parameter is stacked in the EXEC that issues all the FILEDEFs.
- Related products
- All
- Introduced
- Model 204 V6.1
Description
The number of buffers allocated for writing to CCAJLOG when a CCAJLOG DD is defined. The size of each buffer is equal to the BLKSIZE defined for the associated data set. A buffer is written only when it fills.
If the CCAJLOG block size is small, you might need to increase the value to improve performance. Rocket Software recommends setting the CCAJLOG block size as large as possible and using the NLBUFF default setting.