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< * [[VirtTipsAndTricksGuide][Virtuoso Tips and Tricks Collection]]
<
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> * [[VirtTipsAndTricksGuide][Virtuoso Tips and Tricks Collection]]
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< * [[http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtTipsAndTricksGuide][Virtuoso Tips and Tricks Collection]]
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< Query Limits can be set in the [SPARQL] Virtuoso INI section:
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> Query Limits can be set in the <code>[SPARQL]</code> Virtuoso INI section:
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< Virtuoso instance Level (e.g. controlling at the IP level i.e., controlling connections from client addresses)
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> Virtuoso instance Level (e.g., controlling at the IP level; that is, controlling connections from client addresses).
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< This feature is enabled when <code>[HTTPServer]->MaxRestrictedThreads</code> parameter value is less than <code>[Parameters]->ServerThreads</code> parameter value from the Virtuoso INI setting.
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> This feature is enabled when <code><nowiki>[HTTPServer] MaxRestrictedThreads</nowiki></code> parameter value is less than <code><nowiki>[Parameters] ServerThreads</nowiki></code> parameter value in the Virtuoso INI.
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< The Virtuoso Rate Limiter uses a function <code>http_limited ()</code> inside the Sponger code>description.vsp</code> page which checks if given number of running threads are more than the <code>MaxRestrictedThreads</code> parameter's value in the [ServerThreads] INI section. A <code>42000 error</code> is signaled in case of over the limit. By default there is no limit. If there are too many requests then an error 'Limit exceeded' will be signaled.
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> The Virtuoso Rate Limiter uses the <code><nowiki>http_limited()</nowiki></code> function inside the Sponger <code>description.vsp</code> page to check if the number of running threads is more than the <code><nowiki>MaxRestrictedThreads</nowiki></code> parameter's value in the <code><nowiki>[ServerThreads]</nowiki></code> INI section. A <b>42000</b> error is signaled if over this limit. By default, there is no limit. If there are too many requests, then a <b><code>Limit exceeded</code></b> error will be signaled.
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< start to collect statistics), and then to check with <nowiki>http_acl_stats ()</nowiki> what values are returned.
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> start to collect statistics), and then to check with <code><nowiki>http_acl_stats()</nowiki></code> what values are returned.
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< Rate Limit is configurable from Virtuoso Conductor -> System Admin -> Security -> Access Control where:
< * Regular expressions are not supported;
< * Can be used patterns, for ex:
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> Rate Limit is configurable from <b>Virtuoso Conductor -> System Admin -> Security -> Access Control</b> where:
> * Regular expressions are not supported.
> * Patterns may be used; for example —
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<
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< ---++Why?
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> ---++ Why?
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< ---++What?
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> ---++ What?
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< ---+Virtuoso Guide for Administering Your Sponger Instance
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> ---+ Virtuoso Guide for Administering Your Sponger Instance