Janus Web Server performance - Revision history

JAL: /* Janus Web Server and RACF validation */ add section re chunked encoding

2016-04-08T23:05:15Z

Janus Web Server and RACF validation: add section re chunked encoding

← Older revision		Revision as of 23:05, 8 April 2016
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	The <var>WEBOPT</var> parameter is a standard <var class="product">Model 204</var> bitmask-type parameter.		The <var>WEBOPT</var> parameter is a standard <var class="product">Model 204</var> bitmask-type parameter.
	The <code>X'01'</code> setting causes RACF calls to be performed in a special RACF subtask.		The <code>X'01'</code> setting causes RACF calls to be performed in a special RACF subtask.

			==Janus Web Server and chunked encoding==
			Janus Web support for HTTP 1.1 chunked encoding is available. As of Model 204 version 7.6, the Janus Web Server handles <i>inbound</i> chunked HTTP requests. It does not send chunked output, because it always knows the exact length of the entire response.

			For more information about chunked encoding, see http://en.wikipedia.org/wiki/Chunked_transfer_encoding.

	==Keep-Alive support==		==Keep-Alive support==
	<var class="product">Sirius Mods</var> version 6.8 introduced the <var class="product">Janus Web Server</var> port definition		<var class="product">Sirius Mods</var> version 6.8 introduced the <var class="product">Janus Web Server</var> port definition

JAL: maintask instead of main task

2015-06-17T19:32:06Z

maintask instead of main task

← Older revision		Revision as of 19:32, 17 June 2015
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	the RACF call load for login-protected web pages can get very high.		the RACF call load for login-protected web pages can get very high.
	Since these calls often involve synchronous I/Os that stop the <var class="product">Model 204</var>		Since these calls often involve synchronous I/Os that stop the <var class="product">Model 204</var>
	~~main task~~, they are generally not very good for <var class="product">Model 204</var> performance.		maintask, they are generally not very good for <var class="product">Model 204</var> performance.
	However, if you set the <var>[[WEBOPT parameter\|WEBOPT]]</var> system parameter to <code>X'01'</code>,		However, if you set the <var>[[WEBOPT parameter\|WEBOPT]]</var> system parameter to <code>X'01'</code>,
	these calls are done in a subtask,		these calls are done in a subtask,

JAL: minor formatting

2015-06-17T16:20:14Z

minor formatting

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Admin: /* Keep-Alive support */

2011-12-06T23:07:39Z

Keep-Alive support

← Older revision		Revision as of 23:07, 6 December 2011
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	==Keep-Alive support==		==Keep-Alive support==
	<var class="product">Sirius Mods</var> version 6.8 introduced the <var class="product">Janus Web Server</var> port definition		<var class="product">Sirius Mods</var> version 6.8 introduced the <var class="product">Janus Web Server</var> port definition
	parameter <var>[[KEEPALIVE]]</var>, which		parameter <var>[[KEEPALIVE (JANUS DEFINE parameter)\|KEEPALIVE]]</var>, which
	tells <var class="product">Janus Web Server</var> to keep an HTTP connection open for a certain number of		tells <var class="product">Janus Web Server</var> to keep an HTTP connection open for a certain number of
	seconds to allow a client (often a browser) to send another request on		seconds to allow a client (often a browser) to send another request on

JAL2 at 01:09, 19 October 2011

2011-10-19T01:09:55Z

Show changes

JAL2: /* Overhead of entering/exiting APSY subsystem */

2011-10-19T00:20:10Z

Overhead of entering/exiting APSY subsystem

JAL2: Created page with " ==Janus Web Server and APSY subsystems== `Janus Web Server` makes it easy to write "quick-and-dirty" applications. It is simple to specify a `[[JANU..."`

2011-10-18T22:36:55Z

Created page with " ==Janus Web Server and APSY subsystems== <var class="product">Janus Web Server</var> makes it easy to write "quick-and-dirty" applications. It is simple to specify a <var>[[JANU..."

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← Older revision		Revision as of 00:20, 19 October 2011
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	Similarly, exiting the subsystem causes the closing of these same		Similarly, exiting the subsystem causes the closing of these same
	files and/or groups.		files and/or groups.
			<p>
	Because, APSY holds down enqueues on required files and/or groups,		Because, APSY holds down enqueues on required files and/or groups,
	the overhead associated with each open and close is fairly small.		the overhead associated with each open and close is fairly small.
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	the file opening and closing messages to the journal.		the file opening and closing messages to the journal.
	This overhead can be greatly reduced by using the <var>[[WEBAUDIT parameter\|WEBAUDIT]]</var> system		This overhead can be greatly reduced by using the <var>[[WEBAUDIT parameter\|WEBAUDIT]]</var> system
	parameter and the <var>MSGCTL NOAUDIT</var> or <var>NOAUDITW</var> settings, as documented		parameter and the <var>MSGCTL NOAUDIT</var> or <var>NOAUDITW</var> settings, as documented below
	in [[#Janus Web Server audit trail reduction\|"Janus Web Server audit trail reduction"]].		in [[#Janus Web Server audit trail reduction\|"Janus Web Server audit trail reduction"]]. </p>

	By eliminating the logging of file open and close messages to the		By eliminating the logging of file open and close messages to the
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	This CCASYS procedure performs at least one <var>Find</var> (against CCASYS,		This CCASYS procedure performs at least one <var>Find</var> (against CCASYS,
	of course) and might process one or more records in a <var>For Each Record</var> loop.		of course) and might process one or more records in a <var>For Each Record</var> loop.
			<p>
	While this overhead is not huge, it is best to avoid it in <var class="product">Janus Web Server</var>		While this overhead is not huge, it is best to avoid it in <var class="product">Janus Web Server</var>
	applications, if possible, by either of the following:		applications, if possible, by either of the following: </p>
	<ul>		<ul>
	<li>Place code that processes		<li>Place code that processes
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	For this reason, extra efforts should be made to avoid as much		For this reason, extra efforts should be made to avoid as much
	of this overhead as possible for <var class="product">Janus Web Server</var> applications.		of this overhead as possible for <var class="product">Janus Web Server</var> applications.

	===Avoiding table size and parameter setting===		===Avoiding table size and parameter setting===
	Updating user parameter values via <var>RESET</var> command is generally not a tremendously		Updating user parameter values via <var>RESET</var> command is generally not a tremendously

Janus Web Server performance - Revision history

JAL: /* Janus Web Server and RACF validation */ add section re chunked encoding

JAL: maintask instead of main task

JAL: minor formatting

Admin: /* Keep-Alive support */

JAL2 at 01:09, 19 October 2011

JAL2: /* Overhead of entering/exiting APSY subsystem */

JAL2: Created page with " ==Janus Web Server and APSY subsystems== Janus Web Server makes it easy to write "quick-and-dirty" applications. It is simple to specify a [[JANU..."

JAL2: Created page with " ==Janus Web Server and APSY subsystems== `Janus Web Server` makes it easy to write "quick-and-dirty" applications. It is simple to specify a `[[JANU..."`