vmware hot memory add in resource pool

I have increased memory from 1 GB to 2 GB I can see hot plug is enabled for this VM. It's a linux box, but it is in the resource pool, but hot memory add is not working, it is still showing as 1GB after I have added it. in the vsphere client it shows as 2GB.
mokkanAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
what version of Linux is this?

Hot Add Memory has been available for many years, but some distributions of Linux will not automatically recognise the memory. (without intervention)

see here

http://harishdixit.blogspot.co.uk/2012/01/memory-hotplug-for-linux-guests.html

http://kerneltrap.org/node/14009

http://adaptivethinking.wordpress.com/2009/07/27/vsphere-esx4-hot-add-memory-for-linux-guests/

http://communities.vmware.com/docs/DOC-10492
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Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
2GB is not showing in the Linux VM?

The Virtual Machine Guest also needs to support Hot Add CPU and Memory, you also need to have VMware Tools installed.

You may also need to make some modifications or reboot the VM

see here

http://kb.vmware.com/kb/1012764

http://kb.vmware.com/kb/1012764

http://searchvmware.techtarget.com/tip/VMware-vSphere-hot-add-RAM-and-hot-plug-CPU-Not-so-hot-but-still-cool
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mokkanAuthor Commented:
Everything fine, only in OS level it is not showing up.  VMware tools are installed as well.
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mokkanAuthor Commented:
I already did those I can only see memory 0-7, it suppose to show more in OS, but not showing. I'm wondering, is it anything to do with resource pool?
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Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
did you reboot?

what resources are left available in the resource pool?

what is the resource pool set to?
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mokkanAuthor Commented:
I didn't reboot. I want it to be enabled in online
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Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
this may not be possible with your version of Linux! depends on the kernel version and support for Hot Add Memory, see articles above.
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Karthik RajasekaranConsultantCommented:
Hi..

Even though it says it is hot enabled in esx 4.0 to 4.1 it will not work means that you can change the memory and cpu on the fly.  os willl not take effect until it is  rebooted.  i had  ffaced this issue...


But the good news in  esx5.1 or esxi 5.1 it is  working  with  no issues. With hardware  version 9.

Let me know if you have any concerns...

With regards
Karthik rajasekaran
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mokkanAuthor Commented:
we are runnning vmware vcenter  5.0
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Karthik RajasekaranConnect With a Mentor ConsultantCommented:
Upgrade to 5.1 vcenter and esxi 5.1  And hardware upgrade also in the vm also...
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mokkanAuthor Commented:
Thank you
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