121 lines
6.3 KiB
HTML
121 lines
6.3 KiB
HTML
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<HTML>
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<TITLE>CpuLimitPriority</TITLE>
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<H3><A NAME="_k2_cpulimitpriority"></A><SUP></SUP>CpuLimitPriority</H3>
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<P>This metabase property specifies the percentage of CPU time, in 1/1000ths of a percent, that all isolated processes on the Web server can occupy during a given process accounting interval (specified by <A HREF="/iishelp/iis/htm/asp/apro26gc.htm"><B>CpuResetInterval</B></A>). If the processes attempt to occupy more CPU time than specified in <B>CpuLimitPriority</B>, all processes for that server will be set to Idle Class priority until the next process accounting reset. Any new processes on that server will also be set to Idle Class priority. Any limit overrun will be recorded in the Windows Event Log, and, if process accounting is enabled, in the IIS log as well.</P>
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<P>If <B>CpuLimitPriority</B> is set to 0, or a value greater than 100,000 (100 percent), IIS will change the priority of any of the process' threads. However, one of the other process throttling properties, such as <A HREF="/iishelp/iis/htm/asp/apro7e9g.htm"><B>CpuLimitLogEvent</B></A>, <A HREF="/iishelp/iis/htm/asp/apro65rk.htm"><B>CpuLimitProcStop</B></A>, or <A HREF="/iishelp/iis/htm/asp/apro9k85.htm"><B>CpuLimitPause</B></A>, could generate a response from IIS if a CPU limit is exceeded.</P>
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<P><span class=le><B>Note</B></span> Because process accounting in IIS uses Windows Job Objects to monitor CPU times for an entire process, process accounting will log and throttle only applications that are isolated in a separate process from IIS.</P>
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<P>Process throttling and process accounting are independently controlled by several other metabase properties. In order to enable process accounting you must set <A HREF="/iishelp/iis/htm/asp/apro2jtz.htm"><B>CpuEnableLogging</B></A> (which is a member of <A HREF="/iishelp/iis/htm/asp/apro252j.htm"><B>CpuLoggingMask</B></A>) to TRUE, and set at least one other <A HREF="/iishelp/iis/htm/asp/apro252j.htm"><B>CpuLoggingMask</B></A><B> </B>property to TRUE. It is also necessary to set at least one member flag of the <A HREF="/iishelp/iis/htm/asp/apro0eib.htm"><B>CpuLoggingOptions</B></A>, set <A HREF="/iishelp/iis/htm/asp/apro02ss.htm"><B>CpuLoggingInterval</B></A> to a nonzero value, and set either <A HREF="/iishelp/iis/htm/asp/apro7hus.htm"><B>CpuAppEnabled</B></A> or <A HREF="/iishelp/iis/htm/asp/apro709w.htm"><B>CpuCgiEnabled</B></A>, as appropriate, to TRUE.</P>
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<P>To properly activate process throttling, <A HREF="/iishelp/iis/htm/asp/apro7vdw.htm"><B>CpuLimitsEnabled</B></A> must be set to TRUE, and at least one of the following properties should be set to TRUE: <A HREF="/iishelp/iis/htm/asp/apro7e9g.htm"><B>CpuLimitLogEvent</B></A>, <B>CpuLimitPriority</B>, <A HREF="/iishelp/iis/htm/asp/apro65rk.htm"><B>CpuLimitProcStop</B></A>, or <A HREF="/iishelp/iis/htm/asp/apro9k85.htm"><B>CpuLimitPause</B></A>. </P>
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<P><span class=le><B>Important </B></span>Applications that do not have process throttling enabled do not contribute to the total CPU time, for the purposes of calculating CPU limit overruns.</P>
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<TABLE border=0 cellpadding=5 cols=2 frame=box rules=all>
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<TR VALIGN="top">
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<TD width=50%>Data type</TD>
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<TD width=50%>Long</TD>
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</TR>
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<TR VALIGN="top">
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<TD width=50%>Default value</TD>
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<TD width=50%>0 (unlimited)</TD>
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</TR>
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<TR VALIGN="top">
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<TD width=50%>Inheritance</TD>
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<TD width=50%>Inheritable</TD>
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</TR>
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</TABLE><BR>
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<H6>Access Locations</H6>
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<P>This property is accessible at the following locations:</P>
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<TABLE border=0 cellpadding=5 cols=2 frame=box rules=all>
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<TR VALIGN="top">
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<TD class=blue width=50%><B>Metabase Path</B></TD>
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<TD class=blue width=50%><B>Key Type</B></TD>
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</TR>
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<TR VALIGN="top">
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<TD width=50%>/LM/W3SVC</TD>
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<TD width=50%><A HREF="/iishelp/iis/htm/asp/aore1p5x.htm"><B>IIsWebService</B></A></TD>
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</TR>
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<TR VALIGN="top">
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<TD width=50%>/LM/W3SVC/<I>N</I></TD>
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<TD width=50%><A HREF="/iishelp/iis/htm/asp/aore7zn6.htm"><B>IIsWebServer</B></A></TD>
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</TR>
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</TABLE><BR>
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<H6>IIS Admin Base Object Information</H6>
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<P>The following table lists additional information required only for code that uses the IIS Admin Base Object.</P>
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<TABLE border=0 cellpadding=5 cols=2 frame=box rules=all>
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<TR VALIGN="top">
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<TD width=50%>Metabase identifier</TD>
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<TD width=50%><B>MD_CPU_LIMIT_PRIORITY</B></TD>
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</TR>
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<TR VALIGN="top">
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<TD width=50%>User type</TD>
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<TD width=50%><B>IIS_MD_UT_SERVER</B></TD>
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</TR>
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</TABLE><BR>
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<hr class="iis" size="1">
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