[libvirt] Memory allocation/usage

[Claudio Bley]

At Mon, 24 Mar 2014 11:19:35 +0530,
Vikas Kokare wrote:
> We are trying to understand the memory allocation and usage for a KVM guest
> using the libvirt java API version 0.5.0. A certain memoryStats(int) on the
> Domain class allows you to fetch MemoryStatistic values.
> Each of this statistic has a tag and a value. In our case, the values
> returned were
> 
> [tag: 6 val:8388608
> , tag:7 val:8466792
> ]
> 
> What are these tag values(6 and 7) representative of? Do they mean memory
> allocated and memory used. If yes, how can we confirm that?

Have a look here:

http://libvirt.org/html/libvirt-libvirt.html#virDomainMemoryStatTags

According to that definition, '6' represents
VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON and '7' represents
VIR_DOMAIN_MEMORY_STAT_RSS.

(note that the description of those values is off-by-one in the HTML
page).