# zx_system_get_physmem

## NAME

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Get amount of physical memory on the system.

## SYNOPSIS

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```c
#include <zircon/syscalls.h>

uint64_t zx_system_get_physmem(void);
```

## DESCRIPTION

`zx_system_get_physmem()` returns the total size of physical memory on
the machine, in bytes.

## RIGHTS

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TODO(fxbug.dev/32253)

## RETURN VALUE

`zx_system_get_physmem()` returns a number in bytes.

## ERRORS

`zx_system_get_physmem()` cannot fail.

## NOTES

Currently the total size of physical memory cannot change during a run of
the system, only at boot time.  This might change in the future.

## SEE ALSO

 - [`zx_system_get_num_cpus()`]

<!-- References updated by update-docs-from-fidl, do not edit. -->

[`zx_system_get_num_cpus()`]: system_get_num_cpus.md