CFCLASSES Folders

quote:

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Originally posted by: Newsgroup User
But unfortunately cfdirectory does not allow you to filter on dates or
limit the number of rows.

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It does for other folders. Is there something special about this one?

> We run a windows scheduled task to delete class files in that folder that are
> older than a couple of days. I'm currently looking for a better solution...
> typically we have > 15,000 files in there at any one time (that's with clearing
> out files that are older than 2 days!).

You can switch them off completely in CFAdmin. They serve very little
purpose, and apparently slow things down on large applications, a CF has to
to a directory scan each time a template is called to see if the class file
is up to date. I don't imagine the directory scan is such a problem on
*nix systems, but it's slow on Windows once one has more than a few hundred
files in a directory (in my experience).

The only performance hit you will receive if you don't bother saving them
is that the application will be slightly slow after a CF restart, as it
recompiles all the source code (which thenceforth is held in memory). The
only thing the class files are for is to reduce the first compile time:
they're a hindrance after that.

As you should not be doing CF restarts on a production server, there's no
benefit in saving them. And I find CF gets confused sometimes between
which is more up to date - source code or class file - anyhow, so it can
cause issues in a dev environment too.

--
Adam

We run a windows scheduled task to delete class files in that folder that are older than a couple of days. I'm currently looking for a better solution... typically we have > 15,000 files in there at any one time (that's with clearing out files that are older than 2 days!).

> I know about this option. But clients will freak out a lot if the
> application takes a long time to recompile the classes after a restart.

Well: restarting shouldn't be something that happens very often. Esp as
you seem to be running on Linux.

CF ships with a cfcompile.bat (or something, I've never used it), which - I
presume - hits all files in an app and accordingly compiles them. Even if
*it* doesn't do that, it'd be easy enough to write something that does.

> What sucks about all this is that I can't do a "rm -f *" under Linux
> cause it causes the shell to crash.

Uh? How come?

> So I need to do a "rm -f `ls -1 |
> head -n2000`" which is a real pain in the butt.

In Windows I just press ctrl-a and shift-delete: all gone. I seriously
can't believe Windows could possibly achieve any sort of file system
activity better than Linux can. Exactly how many files are you talking
about here?

--
Adam

Hmm!

I know about this option. But clients will freak out a lot if the
application takes a long time to recompile the classes after a restart.

I just ran a test on my test computer not nice. Really not nice if you
run a dozen sites on one install.

What sucks about all this is that I can't do a "rm -f *" under Linux
cause it causes the shell to crash. So I need to do a "rm -f `ls -1 |
head -n2000`" which is a real pain in the butt.

Thanks


Adam Cameron wrote:
> There's an option in CF Administrator not not even create these files in
> the first place. "Save class files". I think it's on the "cache" page, or
> something.
>
> The only time they're used is when the server is restarted, to save the
> server recompiling the source code files: quite a large - one off -
> performance hit.
>
> On the other hand, if they exist, the server needs to check the timestamp
> on the files *every time* they're called, which has a slight performance
> impact.
>

There's an option in CF Administrator not not even create these files in
the first place. "Save class files". I think it's on the "cache" page, or
something.

The only time they're used is when the server is restarted, to save the
server recompiling the source code files: quite a large - one off -
performance hit.

On the other hand, if they exist, the server needs to check the timestamp
on the files *every time* they're called, which has a slight performance
impact.

--
Adam

I was talking about this:

Server Settings > Caching

Maximum number of cached templates

Limits the number of templates cached using template caching. If the
cache is set to a small value, ColdFusion might re-process your
templates. If your server has a sufficient amount of memory, you can
achieve optimum performance by setting this value to the total number of
all of your ColdFusion templates. Setting the cache to a high value does
not automatically reduce available memory because ColdFusion caches
templates incrementally.

But I guess that is the amount of templates in memory not on the hard
drive. Sorry.

Don Vaillancourt wrote:
> You sure. I just checked it now and I can't see it. What's it called.
>
> Or are you talking about trusted templates, which is something entirely
> different.
>
>
> Ian Skinner wrote:
>> There is an Administrator setting that limits how many class files to
>> keep on hand. I would check that out first.
>>
>> Don Vaillancourt wrote:
>>> How does anyone here deal with the cfclasses folder?
>>>
>>> Our application dynamically generates ColdFusion files and sometimes
>>> also deletes them, but ColdFusion never removes any old files from
>>> the cfclasses folder. Has anyone come up with any clever solutions
>>> on how to resolve this. I've thought about using a scheduled task to
>>> remove any class files which may be older than a certain date,
>>> knowing full well that they could still be legitimate files.
>>>
>>> But unfortunately cfdirectory does not allow you to filter on dates
>>> or limit the number of rows.
>>>
>>> Any ideas are welcome.
>>>
>>> Thanks

You sure. I just checked it now and I can't see it. What's it called.

Or are you talking about trusted templates, which is something entirely
different.


Ian Skinner wrote:
> There is an Administrator setting that limits how many class files to
> keep on hand. I would check that out first.
>
> Don Vaillancourt wrote:
>> How does anyone here deal with the cfclasses folder?
>>
>> Our application dynamically generates ColdFusion files and sometimes
>> also deletes them, but ColdFusion never removes any old files from the
>> cfclasses folder. Has anyone come up with any clever solutions on how
>> to resolve this. I've thought about using a scheduled task to remove
>> any class files which may be older than a certain date, knowing full
>> well that they could still be legitimate files.
>>
>> But unfortunately cfdirectory does not allow you to filter on dates or
>> limit the number of rows.
>>
>> Any ideas are welcome.
>>
>> Thanks

There is an Administrator setting that limits how many class files to
keep on hand. I would check that out first.

Don Vaillancourt wrote:
> How does anyone here deal with the cfclasses folder?
>
> Our application dynamically generates ColdFusion files and sometimes
> also deletes them, but ColdFusion never removes any old files from the
> cfclasses folder. Has anyone come up with any clever solutions on how
> to resolve this. I've thought about using a scheduled task to remove
> any class files which may be older than a certain date, knowing full
> well that they could still be legitimate files.
>
> But unfortunately cfdirectory does not allow you to filter on dates or
> limit the number of rows.
>
> Any ideas are welcome.
>
> Thanks