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---+Configuring the Query Timeout setting for the Virtuoso Facet Browser

---++What

The [[VirtFacetBrowserInstallConfig][Facet Browser]]'s timeout setting is configurable by instance owner or other user with DBA privileges.

---++Why

Administratively controlling the maximum query timeout ordinary users may apply helps protect against accidental and intentional denial-of-service attacks, by timing out excessively long-running queries.

---++How

By default, the Facet Browser's query execution timeout, <b><code><nowiki>fct_timeout_max</nowiki></code></b>, is set to <b><code>20000</code> milliseconds</b> ( = 20 seconds). 

A user with administrator privileges can alter the default setting with a command like this (setting it to 30000 milliseconds, or 30 seconds):

<b>Single Server:</b>
<verbatim>
registry_set ('fct_timeout_max', '30000')
</verbatim>
<BR>
<b>Cluster:</b>
<BR>
<verbatim>
cl_exec ('registry_set (''fct_timeout_max'', ''30000'')')
</verbatim>

---++Related

   * [[VirtTipsAndTricksGuide][Virtuoso Tips and Tricks Collection]]
   * [[VirtFacetBrowserInstallConfig][Installation and Configuration of the Virtuoso Facet Browser]] 
   * [[http://docs.openlinksw.com/virtuoso/virtuosospongerfacent.html#virtuosospongerfacentuirestapi][Virtuoso APIs for Faceted REST services]]