PURGING CACHE…

[Kevin Gardam]

Thanks David and Gary, that explains it, the POA cache only applies to FCP4.5 and earlier. I never said I was in FCP 5… sorry.
Really appreciate you sticking with this. Whats the difference between the Obj cache and the Prof cache.

The trouble I have is if I have 6 -10 30 min timelines to layback…all rendered in safe RT. The first 3-4 T/L’s go back to tape with no problems. Each time I pull a T/L up to layback I get a render bar, and the render takes longer and longer the more T/L’s I layback. The first T/L has no render and the last can take several minutes.
It shouldn’t have to render any of them as they have all been rendered out before I layback. This is why I think I get a corrupted cache.

[Steve Covello]

You might want to use Tiger Cache Cleaner [tcc] on versiontracker. If you have output problems, you are likely to be successful after purging the temporary files stored in various User and System caches if the FCP Rescue 5 trick doesn’t do it. TCC is a deeper level of ‘cleaning’ which I don’t fully understand more than that the system and applications create temporary files as part of the automatic Virtual Memory that OSX requires.

If you go into Utilities/Activity Monitor, you can see how many mb are used as virtual memory for each application or task that you have open [select All Activities]. FYI, virtual memory is data that the OS writes to a temporary file on your disk to serve as the equivalent of regular RAM. It is supposed to be deleted or replaced as new data gets created. In the old OS9, you could manually turn VM on/off and set the size limit, however OSX has taken that option away and does it dynamically — thus dynamic RAM — which causes us to have the necessity to purge various caches now and then.

I am making the leap here that VM and cache-purging troubleshooting activities are somewhow connected, though I am not an engineer. nonetheless, anytime I have an input/output problem on FCP, using TCC on Medium Cleaning on all levels does the trick.

steve covello
double wide post

[Kevin Gardam]

Thanks Steve,
I’m running 10.3.9 not tiger so don’t think I’ll be able to run the tiger cache cleaner. But thanks for the contribution.
What I have done and it certainly has improved things is throw the Obj cache and the Prof cache, leaving the pref file alone. Whats great is that they can be thrown from the desktop…no more shutdowns. The machine is singing at the present…long it may stay that way.
Kev