"Ian Cox" <ian_cox2000@hotmail.com> wrote in message
news:uorm7I3tEHA.3460@TK2MSFTNGP15.phx.gbl...
> Hello. I hope someone can help us.
> We have an ASP.NET application that uses caching, which has given us
> dramatic performance benefits..
> We use file dependency expiry and sql triggers to create a file, so that
> we
> can expire the cache when database updates are made.
> It had been working fine until relatively recently when we noticed that
> sometimes the cache was not being cleared as expected. The files are still
> being created successfully and the name of the file matches the name of
> the
> cache dependency.
> It seems that after an amount of time (or maybe an amount of cached items)
> the depency link is severed somehow.
> If we reset the web app and thus flush everything, it works ok for a short
> while and then stops working again.
> We have a page that we use to manually clear items from cache, or indeed
> clear everything from cache. This basically creates the files behind the
> scenes and puts them in the cache dependency folder.
> Using this to test with, I can see that it is working normally straight
> after a web app reset. If I click the button everything is cleared from
> cache. Sometime afterward (1hr-ish?) if I click the button items are not
> cleared from cache.
>
> Has anyone noticed anything like this before? All suggestions greatly
> appreciated.
>
> Cheers
> Ian
>
>

"Alvin Bruney [MVP]" <vapor at steaming post office> wrote in message
news:eNi2KO7tEHA.3088@tk2msftngp13.phx.gbl...
> Reset your cache dependency to fire every 5 minutes or so and write a log
> somewhere. The idea is to find out when the dependency goes away. Then you
> can see if this is a setting in your config file somewhere that somebody
has
> set.
>
> --
> Regards,
> Alvin Bruney
> [ASP.NET MVP http://mvp.support.microsoft.com/default.aspx]
> Got tidbits? Get it here... http://tinyurl.com/27cok
> "Ian Cox" <ian_cox2000@hotmail.com> wrote in message
> news:uorm7I3tEHA.3460@TK2MSFTNGP15.phx.gbl...
> > Hello. I hope someone can help us.
> > We have an ASP.NET application that uses caching, which has given us
> > dramatic performance benefits..
> > We use file dependency expiry and sql triggers to create a file, so that
> > we
> > can expire the cache when database updates are made.
> > It had been working fine until relatively recently when we noticed that
> > sometimes the cache was not being cleared as expected. The files are
still
> > being created successfully and the name of the file matches the name of
> > the
> > cache dependency.
> > It seems that after an amount of time (or maybe an amount of cached
items)
> > the depency link is severed somehow.
> > If we reset the web app and thus flush everything, it works ok for a
short
> > while and then stops working again.
> > We have a page that we use to manually clear items from cache, or indeed
> > clear everything from cache. This basically creates the files behind the
> > scenes and puts them in the cache dependency folder.
> > Using this to test with, I can see that it is working normally straight
> > after a web app reset. If I click the button everything is cleared from
> > cache. Sometime afterward (1hr-ish?) if I click the button items are not
> > cleared from cache.
> >
> > Has anyone noticed anything like this before? All suggestions greatly
> > appreciated.
> >
> > Cheers
> > Ian
> >
> >
>
>