NUMBUFG parameter - Revision history

DCameron: /* Setting NUMBUFG */

2020-08-26T14:49:25Z

Setting NUMBUFG

← Older revision		Revision as of 14:49, 26 August 2020
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	<li>The X'02' bit of the <var>[[XMEMOPT parameter\|XMEMOPT]]</var> parameter (the default), must also be set. </li>		<li>The X'02' bit of the <var>[[XMEMOPT parameter\|XMEMOPT]]</var> parameter (the default), must also be set. </li>

	<li>The [[File Load utility: FLOD and FILELOAD commands\|FLOD and FILELOAD commands]] and [[Fast/Reload]] are not available due to 64-bit addressing conflicts.		<li>The [[File Load utility: FLOD and FILELOAD commands\|FLOD and FILELOAD commands]] and [[Fast/Reload]] are not available due to 64-bit addressing conflicts. This particular restriction is removed in V7.7 and later releases.
	</ul>		</ul>
	</blockquote>		</blockquote>

JAL: /* Setting NUMBUFG */ FLOD/FILELOAD conflict

2017-05-12T18:48:43Z

Setting NUMBUFG: FLOD/FILELOAD conflict

← Older revision		Revision as of 18:48, 12 May 2017
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	*** M204.0075: Initialization completed. Buffers = 0+59		*** M204.0075: Initialization completed. Buffers = 0+59
	</p>		</p>
	<p>		<blockquote class="note"><b>Note:</b>
	If you set <var>NUMBUFG</var> greater than 0~~, the~~ X'02' bit of the <var>[[XMEMOPT parameter\|XMEMOPT]]</var> parameter (the default), must also be set. </p>		<p>If you set <var>NUMBUFG</var> greater than 0: </p>
			<ul>
			<li>The X'02' bit of the <var>[[XMEMOPT parameter\|XMEMOPT]]</var> parameter (the default), must also be set. </li>

			<li>The [[File Load utility: FLOD and FILELOAD commands\|FLOD and FILELOAD commands]] and [[Fast/Reload]] are not available due to 64-bit addressing conflicts.
			</ul>
			</blockquote>

	==See also==		==See also==

JAL: /* Description */ add heading

2017-02-06T23:16:41Z

Description: add heading

← Older revision		Revision as of 23:16, 6 February 2017
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	</li>		</li>
	</ul>		</ul>

			===Setting NUMBUFG===
	<p>		<p>
	The maximum number of buffers is <code>2**31/3</code>, or <code>715,827,882</code>, which limits buffer pools to 4.2 terabytes or less.</p>		The maximum number of buffers is <code>2**31/3</code>, or <code>715,827,882</code>, which limits buffer pools to 4.2 terabytes or less.</p>

JAL: X'02' bit of XMEMOPT must be on to enable ATB support

2017-02-02T00:36:23Z

X'02' bit of XMEMOPT must be on to enable ATB support

← Older revision		Revision as of 00:36, 2 February 2017
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	</p>		</p>
	<p>		<p>
	If you set <var>NUMBUFG</var> to a lower value~~, it~~ is reset to the calculated value and you receive messages like the following: </p>		If you set <var>NUMBUFG</var> to a value lower than the minimum, the value is reset to the calculated value and you receive messages like the following: </p>
	<p class="code">*** M204.2756: NUMBUFG reset to NLRUQG * ((NSERVS + NSUBTKS) * MAXOBUF + 15)		<p class="code">*** M204.2756: NUMBUFG reset to NLRUQG * ((NSERVS + NSUBTKS) * MAXOBUF + 15)
	= 1 * ((2+9) * 4 + 15) = 59		= 1 * ((2+9) * 4 + 15) = 59
	*** M204.0075: Initialization completed. Buffers = 0+59		*** M204.0075: Initialization completed. Buffers = 0+59
	</p>		</p>
			<p>
			If you set <var>NUMBUFG</var> greater than 0, the X'02' bit of the <var>[[XMEMOPT parameter\|XMEMOPT]]</var> parameter (the default), must also be set. </p>

	==See also==		==See also==

JAL: /* See also */ slight change to link destination

2016-08-29T18:32:15Z

See also: slight change to link destination

← Older revision		Revision as of 18:32, 29 August 2016
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	==See also==		==See also==
	For more information about setting <var>NUMBUFG</var>, see [[Defining the runtime environment (CCAIN)#~~Managing~~ ATB storage ~~with NUMBUFG~~\|~~Managing~~ ATB storage ~~with NUMBUFG~~]].		For more information about setting <var>NUMBUFG</var>, see [[Defining the runtime environment (CCAIN)#Using 64-bit addressing and Above the Bar (ATB) storage\|Using 64-bit addressing and Above the Bar (ATB) storage]].

	[[Category:System parameters]]		[[Category:System parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

JAL: add example

2016-08-25T15:51:31Z

add example

← Older revision		Revision as of 15:51, 25 August 2016
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	</p>		</p>
	<p>		<p>
	If you set <var>NUMBUFG</var> to a lower value, it is reset to the calculated value.</p>		If you set <var>NUMBUFG</var> to a lower value, it is reset to the calculated value and you receive messages like the following: </p>
			<p class="code">*** M204.2756: NUMBUFG reset to NLRUQG * ((NSERVS + NSUBTKS) * MAXOBUF + 15)
			= 1 * ((2+9) * 4 + 15) = 59
			*** M204.0075: Initialization completed. Buffers = 0+59
			</p>

	==See also==		==See also==

JAL: /* Description */ add clarifying phrase

2016-08-24T18:32:59Z

Description: add clarifying phrase

← Older revision		Revision as of 18:32, 24 August 2016
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	If <var>NUMBUFG</var> is specified, no buffer pool buffers are built BTB; all buffers are ATB. Model 204 obtains exactly the <var>NUMBUFG</var> number of buffers. </p>		If <var>NUMBUFG</var> is specified, no buffer pool buffers are built BTB; all buffers are ATB. Model 204 obtains exactly the <var>NUMBUFG</var> number of buffers. </p>
	<p>		<p>
	<var>NUMBUFG</var> essentially replaces ~~both~~ <var>~~MINBUF~~</var> and ~~<var>MAXBUF</var>:~~ <var>MINBUF</var> is automatically reset to 0, and <var>MAXBUF</var> and <var>SPCORE</var> are ignored. </p>		In this case, <var>NUMBUFG</var> essentially replaces the BTB parameters: <var>NUMBUF</var> and <var>MINBUF</var> are automatically reset to 0, and <var>MAXBUF</var> and <var>SPCORE</var> are ignored. </p>
	</li>		</li>
	</ul>		</ul>

JAL: add clarifying phrase

2016-08-24T18:13:35Z

add clarifying phrase

← Older revision		Revision as of 18:13, 24 August 2016
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	<ul>		<ul>
	<li>Prior to version 7.7 of Model 204:		<li>Prior to version 7.7 of Model 204:
	<p><var>NUMBUFG</var> specifies the number of buffer pool buffers built ATB, ~~and~~ the number of buffer pool buffers built BTB is based on the setting of <var>[[MINBUF parameter\|MINBUF]]</var>, <var>[[MAXBUF parameter\|MAXBUF]]</var>, and <var>[[SPCORE parameter\|SPCORE]]</var>.</p></li>		<p>
			<var>NUMBUFG</var> specifies the number of buffer pool buffers built ATB, while the number of buffer pool buffers built BTB is based on the setting of <var>[[MINBUF parameter\|MINBUF]]</var>, <var>[[MAXBUF parameter\|MAXBUF]]</var>, and <var>[[SPCORE parameter\|SPCORE]]</var>.</p></li>

	<li>As of version 7.7:		<li>As of version 7.7:
	<p>If <var>NUMBUFG</var> is specified, no buffer pool buffers are built BTB; all buffers are ATB. ~~The~~ <var>MINBUF</var> ~~parameter~~ is automatically reset to 0, and <var>MAXBUF</var> and <var>SPCORE</var> are ignored. </p>		<p>
			If <var>NUMBUFG</var> is specified, no buffer pool buffers are built BTB; all buffers are ATB. Model 204 obtains exactly the <var>NUMBUFG</var> number of buffers. </p>
			<p>
			<var>NUMBUFG</var> essentially replaces both <var>MINBUF</var> and <var>MAXBUF</var>: <var>MINBUF</var> is automatically reset to 0, and <var>MAXBUF</var> and <var>SPCORE</var> are ignored. </p>
	</li>		</li>
	</ul>		</ul>

JAL: /* Description */ add heading

2016-08-18T22:55:37Z

Description: add heading

← Older revision		Revision as of 22:55, 18 August 2016
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	<p>		<p>
	If you set <var>NUMBUFG</var> to a lower value, it is reset to the calculated value.</p>		If you set <var>NUMBUFG</var> to a lower value, it is reset to the calculated value.</p>
	~~<p>~~
	For more information about setting <var>NUMBUFG</var>, see [[Defining the runtime environment (CCAIN)#Managing ATB storage with NUMBUFG\|Managing ATB storage with NUMBUFG]]. ~~</p>~~		==See also==
			For more information about setting <var>NUMBUFG</var>, see [[Defining the runtime environment (CCAIN)#Managing ATB storage with NUMBUFG\|Managing ATB storage with NUMBUFG]].

	[[Category:System parameters]]		[[Category:System parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

JAL: /* Description */ add links

2016-08-18T22:54:15Z

Description: add links

← Older revision		Revision as of 22:54, 18 August 2016
Line 19:		Line 19:
	<ul>		<ul>
	<li>Prior to version 7.7 of Model 204:		<li>Prior to version 7.7 of Model 204:
	<p><var>NUMBUFG</var> specifies the number of buffer pool buffers built ATB, and the number of buffer pool buffers built BTB is based on the setting of <var>MINBUF</var>, <var>MAXBUF</var>, and <var>SPCORE</var>.</p></li>		<p><var>NUMBUFG</var> specifies the number of buffer pool buffers built ATB, and the number of buffer pool buffers built BTB is based on the setting of <var>[[MINBUF parameter\|MINBUF]]</var>, <var>[[MAXBUF parameter\|MAXBUF]]</var>, and <var>[[SPCORE parameter\|SPCORE]]</var>.</p></li>

	<li>As of version 7.7:		<li>As of version 7.7:
	<p>If <var>NUMBUFG</var> is specified, no buffer pool buffers are built BTB; all buffers are ATB. The <var>MINBUF</var> parameter is automatically reset to 0, and <var>MAXBUF</var> and <var>SPCORE</var> are ignored. </p></li>		<p>If <var>NUMBUFG</var> is specified, no buffer pool buffers are built BTB; all buffers are ATB. The <var>MINBUF</var> parameter is automatically reset to 0, and <var>MAXBUF</var> and <var>SPCORE</var> are ignored. </p>
			</li>
	</ul>		</ul>

	<p>		<p>
	The maximum number of buffers is <code>2**31/3</code>, or <code>715,827,882</code>, which limits buffer pools to 4.2 terabytes or less.</p>		The maximum number of buffers is <code>2**31/3</code>, or <code>715,827,882</code>, which limits buffer pools to 4.2 terabytes or less.</p>
	<p>		<p>
	For ~~background~~ information, see [[Defining the runtime environment (CCAIN)#~~Disk buffers and Model 204~~ storage\|~~Disk buffers and Model 204~~ storage]]. </p>		The minimum number of ATB buffers is: </p>
			<p class="code">[[NLRUQG parameter\|NLRUQG]] * (([[NSERVS parameter\|NSERVS]] + [[NSUBTKS parameter\|NSUBTKS]]) * [[MAXOBUF parameter\|MAXOBUF]] + 15)
			</p>
			<p>
			If you set <var>NUMBUFG</var> to a lower value, it is reset to the calculated value.</p>
			<p>
			For more information about setting <var>NUMBUFG</var>, see [[Defining the runtime environment (CCAIN)#Managing ATB storage with NUMBUFG\|Managing ATB storage with NUMBUFG]]. </p>

	[[Category:System parameters]]		[[Category:System parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]