Python Resource Module
The resource module provides basic mechanisms for measuring and controlling system resources utilized by a program.
Note: This module is only available on Unix.
Importing the Module
import resourceResource Usage
You can retrieve resource usage information for the current process or its children using resource.getrusage().
import resource
usage = resource.getrusage(resource.RUSAGE_SELF)
print(f"User time: {usage.ru_utime}")
print(f"System time: {usage.ru_stime}")
print(f"Max RSS: {usage.ru_maxrss}")Resource Limits
The module allows you to get and set soft and hard limits on system resources.
- Soft Limit: The current limit. Can be raised by the process up to the hard limit.
- Hard Limit: The maximum value the soft limit can be raised to. Can only be lowered by the process (unless root).
Getting Limits
import resource
soft, hard = resource.getrlimit(resource.RLIMIT_NOFILE)
print(f"Soft limit: {soft}, Hard limit: {hard}")Setting Limits
import resource
# Set the maximum number of open files
resource.setrlimit(resource.RLIMIT_NOFILE, (1024, 2048))Common Resources
resource.RLIMIT_CORE: The maximum size (in bytes) of a core file that the current process can create.resource.RLIMIT_CPU: The maximum amount of processor time (in seconds) that a process can use.resource.RLIMIT_FSIZE: The maximum size of a file which the process may create.resource.RLIMIT_DATA: The maximum size of the process's heap.resource.RLIMIT_STACK: The maximum size of the call stack for the current process.resource.RLIMIT_RSS: The maximum resident set size that should be made available to the process.resource.RLIMIT_NOFILE: The maximum number of open file descriptors for the current process.resource.RLIMIT_AS: The maximum area (in bytes) of address space which may be taken by the process.