[Thomas Bradley]

Joey,
Thats OK,
thanks for the apology,
I might of over reacted also, just felt it was a bit of a harsh thing to say to me, specially when I am learning here.

Any way, matter closed now.

Unfortunately I cant go above 8 gig but AE is a hobby only and not part of my work so I hope to be OK, after reading lots on this subject your probably right about leaving off but yeah I will run some tests just to find out what the difference are.

cheers,

T

[Thomas Bradley]

Joey Burnham,
What you going on about mate,
Im a polite person but dont take the piss!

I am new to AE and trying to learn stuff here which I have and said as much.

Dont bother come into my topics with your stupid crap, I wouldn’t do it yours!

I am not some fool who will just do what people tell me to do, like leave my head in the oven coz some geezer on a forum told me to, I like to learn the whys and hows of some thing and find things out for my self, that is called intelligence something you might be lacking in!

this kinda thing really does annoy me,
I run my own Photoshop forum and if some one dared to speak to another member like this he would be sorted out!

[Thomas Bradley]

Thanks,
I found a nice guide of Todd’s that will help.

I like to try and get the most out of what I have plus I all for learning new things and do tend to get real deep with them specially if it is a problem for me.

I have seen others advise not to use MP with only 8 Gig but that was when having more than 4 cores.
So I think it will probably be better for me to just test and try and you might be right Dave and I might find it better not to use MP.

Cheers again,

T

[Thomas Bradley]

well I have always known that.

What I am starting to learn is the idea of MP and calculations between Ram for MP and Front end needed ram, then consider BG applications also.

Like said I have learnt a lot from this topic and my plans for the future are open for change, I said as much.

I shall experiment myself when the time arrives.

Thanks.

T

[Thomas Bradley]

Yes after having this discussion and also reading some of your articles (Todd) I think the same so it is turned off!

When my new memory comes in a few days and i have 8 gig I will allow maybe 2 cores or even just one additional core for MP and give it 1.5/2.0 of memory form what I have been reading this should suffice.
but that is open for change also, I am learning as I go here, lol.

I think the problem with my machine at the moment having just 4 gigs is that I have Intel HD Graphics which are integrated and take a minimum of 128MB (even if not using it it is assigned) of system ram for that purpose, so AE will only see 3.8.

Am I right in reading that AE will only use MP if 2 or more cores can be used?

Thanks for all your help I have learnt a lot.

Tom.

[Thomas Bradley]

sorry for the double post but I think this might help.

When I run AE CS5 I have only one instant of After FX.exe in task manger,
so I am presuming that multi processing is not working, also it says as much in p[references.
How ever when I run AE CS3 I have3 instances of After FX.exe in task manager which would lead me to think there are 2 additional cores working even though preferences are saying 1 additional cpu being used.

dont know if this helps make sense of what is happening in cs5/3 with me?

T

[Thomas Bradley]

right,
so mine is not working,
AE is telling me that I have 3.8 GB of ram, even though I have 4 gigs,
so could this be why?

that takes your calculation down to 1.4 sop enough for 1 process yes?

so why am I not being allowed to use it?

Like I said I get the option to turn it on and change settings but no matter what settings I use I can not get it to change from 0, 0 being the number that relates to cores that will be used.

Ive just tried CS3 and that as you now does not let you change settings but works things out for its self, and in there it IS saying that 1 additional processor will be used which make sense from he calculations above.

How ever CS5 is not saying any additional cores/processors will be used.

Tom

PS: thanks for taking time to help me on this. If needed I can add some screen shots if allowed.

[Thomas Bradley]

OK after reading the links you gave me on the other similar topic I understand it better now.
I am wrong,
Todd you are completely right that it was it says.

So am I right in thinking of it like this:

I have 4 gig of ram installed at the moment.
I have 4 cores ( 2 physical and to virtual) After Effects reads it as 4 and list 4 in preferences.

After Effects leaves at least 1.5 gig of ram for other applications and this amount cant go lower (well not using settings in preferences from my experience)

The minimum setting in after effects preferences for multi processing is .75gig ram per process.
4 cores so 4x.75=3 gig which is more than AE has left after it allows 1.5 minimum to other apps. So multi process wont work.
Is that right?

My old computer had just 2 cores and 4 gig of ram and I could get multi processing to work only if I set background process ram allocation to .75 gig of ram )maybe as high as 1 gig) as I did not have enough to go higher.

Now i have same amount of ram but 4 cores I can not get it to work, I get the option to turn it on but I can not get it to set an amount of cores that will be used, it stays on 0 no matter how I tweak then settings.

Maybe there is a way to allow AE to use more ram than the system allows but I do not know, would be nice to find out.

I know my system could run on a gig of ram so I could have 3 for AE and then 4 cores and .75 could get multi processing to work perhaps.

I apologize again for my Mistake Todd.

Tom

[Thomas Bradley]

I am sorry you are right that is what it says.

I am trying to figure this out now.

This aint my topic so I wont hijack it.

But if I have this understood now it go’s like this:

If you have 4 gig of ram installed After Effects will keep a minimum of 1.5 gig reserved for other applications, this is established in Preferences as it wont allow it to go lower (well not on my machine any way)

So if you then have 4 cores ( virtual or logical) and the lowest setting for each background process is .75 gig of ram then 4 x .75 = 3 gig of ram which AE doesn’t have to play with so it can not multiprocess for you.

Maybe that is right?

I am sorry for the previous answer, I was taking into account what I have experienced and what i thought I read but after checking you are completely right Todd.

Tom

[Thomas Bradley]

HI, how many cores or CPU’s do you have?

The AE help files say that a core starts with 2 gig of ram.

So a 4 core cpu will need 8 gig of ram to use multi processing.

My old computer had 2 cores and 4 gig of ram so could MP )multi process)
My new comp has 2 cores but 4 threads so it reads as 4 cores but I only have 4 gig ram (at the moment!) so MP wont work for me right now.

I see you have stated that you have 7.8 gig, I am guessing that means 8 gig or just over, so unless you are using more than 4 cores I cant think of why this would happen.