source: trunk/server/docs-xml/smbdotconf/printing/lpqcachetime.xml

<samba:parameter name="lpq cache time"
                 context="G"
                 type="integer"
                 developer="1"
                 xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
<description>
        <para>This controls how long lpq info will be cached 
        for to prevent the <command moreinfo="none">lpq</command> command being called too 
        often. A separate cache is kept for each variation of the <command moreinfo="none">
        lpq</command> command used by the system, so if you use different 
        <command moreinfo="none">lpq</command> commands for different users then they won't
        share cache information.</para>

        <para>The cache files are stored in <filename moreinfo="none">/tmp/lpq.xxxx</filename> 
        where xxxx is a hash of the <command moreinfo="none">lpq</command> command in use.</para>

        <para>The default is 30 seconds, meaning that the cached results 
        of a previous identical <command moreinfo="none">lpq</command> command will be used 
        if the cached data is less than 30 seconds old. A large value may 
        be advisable if your <command moreinfo="none">lpq</command> command is very slow.</para>

<para>A value of 0 will disable caching completely.</para>
</description>

<related>printing</related>

<value type="default">30</value>
<value type="example">10</value>
</samba:parameter>