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How to check total RAM memory available in a VPS in *realtime* .. ?

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ahmadka

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2011
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Hi guys .. I recently purchased a VPS, and on paper its supposed to give me 1 GB of dedicated memory and another 1 GB of burstable memory ... So at any given time, the total amount of memory that should be available to me should be between 1 GB and 2 GB, right ? Correct me if I'm wrong ..

How can I check this from within my Ubuntu VPS ? So that I know I'm getting what I'm paying for ..
 
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Well, the reason why I think I'm running low on memory is because when I have a VPN session on and I type in 'java' (needed for jDownloader) in the console, I get the following error:

Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
Click to expand...

However, if I restart the VPS and do not start the VPN service, and instead just login through ssh again and type in java, I get the correct response (all java parameters listed, etc) ...

So how can check this out ?

I tried to use 'free', and the output I get is this:

root@server1:~# free
total used free shared buffers cached
Mem: 4294967292 190300 4294776992 0 0 51608
-/+ buffers/cache: 138692 4294828600
Swap: 524288 0 524288
root@server1:~#
Click to expand...

And I'm not really sure what this means ..
 
I can't say for sure but looks like the server has 4 gig and all of it is being used in a shared pool with a swap file of only 512kb. In my opinion swap file should be at least same size as available ram. It also should be 4 gig.

SO I would guess and say that you are being cheated and not getting 1 gig dedicated.

Top should give you what is running on your vps and how much memory is used for each program. Add it up and see what is the total .

What does top show when you get the memory error AND what does top show after you reboot?
 
Lock Down said:
I can't say for sure but looks like the server has 4 gig and all of it is being used in a shared pool with a swap file of only 512kb. In my opinion swap file should be at least same size as available ram. It also should be 4 gig.

SO I would guess and say that you are being cheated and not getting 1 gig dedicated.

Top should give you what is running on your vps and how much memory is used for each program. Add it up and see what is the total .

What does top show when you get the memory error AND what does top show after you reboot?
Click to expand...


Actually the swap file is 512 MB, not 512 KB ..

I tried using 'top' but I don't know how to see ALL apps I'm running in one view, so that I can add their total memory used ..


Its quite surprising there's no easy way to check this in linux, of all OSes ... I thought this would be pretty easy to do ..;)
 
To check free memory in Megabytes
Code: 
free -m
minus the cached memory from used RAM to get original RAM usage.

You can use
Code: 
top
to get system monitor and hit Shift+M (capital M) to get processes ordered by RAM usage.

You can also use
Code: 
ps aux
to get all processes list.

Regards
 
prueba

ahmadka said:
Hi guys .. I recently purchased a VPS, and on paper its supposed to give me 1 GB of dedicated memory and another 1 GB of burstable memory ... So at any given time, the total amount of memory that should be available to me should be between 1 GB and 2 GB, right ? Correct me if I'm wrong ..

How can I check this from within my Ubuntu VPS ? So that I know I'm getting what I'm paying for ..
Click to expand...
mira el manueal
 
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