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<HTML
><HEAD
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>Modifying Your Running System</TITLE
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>4.4. Modifying Your Running System</H1
><P
>Bugzilla optimizes database lookups by storing all relatively
      static information in the 
      <TT
CLASS="filename"
>versioncache</TT
> file, located in the 
      <TT
CLASS="filename"
>data/</TT
>
      subdirectory under your installation directory.</P
><P
>If you make a change to the structural data in your database (the
      versions table for example), or to the 
      <SPAN
CLASS="QUOTE"
>"constants"</SPAN
>

      encoded in <TT
CLASS="filename"
>defparams.pl</TT
>, you will need to remove 
      the cached content from the data directory (by doing a 
      <SPAN
CLASS="QUOTE"
>"rm data/versioncache"</SPAN
>

      ), or your changes won't show up.</P
><P
> <TT
CLASS="filename"
>versioncache</TT
> 
      gets automatically regenerated whenever it's more than
      an hour old, so Bugzilla will eventually notice your changes by itself,
      but generally you want it to notice right away, so that you can test
      things.</P
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