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List:       suse-linux-e
Subject:    RE: [SLE] OO: If you can make it, I can break it!
From:       "Carlos E. R." <robin1.listas () tiscali ! es>
Date:       2005-12-30 0:38:41
Message-ID: Pine.LNX.4.61.0512300117310.22809 () nimrodel ! valinor
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The Thursday 2005-12-29 at 18:29 -0500, Ken Schneider wrote:

> > Actually, the cache/buffer memory makes the system go faster. The more you
> > have there, the faster.
> >
> > That's why the second time you load OOo, without the quickstarter, it
> > loads faster: it doesn't need to read from disk, it is already in memory.
> >
>
> But -that- is the whole problem with "perception" with -new- users. They
> load a program like OO and it takes them forever the first time and they
> then think that -everything- runs slower. If there was a limit to how
> much ram was used by cache/buffer, programs would load faster the
> -first- time because memory would be available the first time it was
> started.

No, you are wrong there; cache memory is freed instantly, the worst
problem is disk I/O. OOo is huge, and has to be loaded.

You can try very easily: start up your system, get in to X mode with a
small memory footprint environment - almost anyone except kde (if you
have 1GB, then use kde if you like). Start an xterm with "top" running on
it; watch the free free memory display, you should have a lot still, and
litle memory dedicated to cache; then start up OOo. You will see little or
no diference compared to when the chache is in use, provided there is
enough free memory. In fact, it may be slower.

> The "perception" that new users need to have is that linux is
> as fast as MS Windows or better yet faster.
> The cache/buffer use needs to be a tunable parameter.

No, the kernel knows better than you (we) in this respect.

- --
Cheers,
       Carlos Robinson
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