Allocated memory

[Ronelle van Niekerk]

Is there a way to tell how much memory is allocated and how much is free?

[Bill Hassell · Accepted solution]

HP-UX memory (and true for most Unix systems) is very complex. There is memory allocated to the kernel and to processes. But then there are shared resources such as the buffer cache and shared libraries. And programs can share memory with each other. HP-UX is also a virtual memory system so the amount of memory available to processes includes swap space. This means that more programs can be run than will fit into physical memory.

The only simple way is to run glance, a purchased product from HP that simplifies performance monitoring.

[James Murtagh]

Hi Ronelle,

The easy way to find the used memory is to find the free memory and subtract that from physical memory. You can find the free memory under the "free" column from the vmstat command. You can use various tools to find the physical memory, this command will work for 11.x ->

# echo phys_mem_pages/D|adb /stand/vmunix /dev/kmem

This is the number of 4k pages. You can also find it in the syslog, maybe dmesg will show it if its still in the buffer.

Cheers,

James.

[Ronelle van Niekerk]

Thanks guys,

Those are pretty much the answers I was expecting.
Was asked by a customer and just needed better wording to tell him that it will not be easy to find out.

-Ronelle