How do I close the files from tempfile.mkstemp?
Since mkstemp() returns a raw file descriptor, you can use os.close(): import os from tempfile import mkstemp for n in xrange(1024 + 1): f, path = mkstemp() # Do something with ‘f’… os.close(f)
ulimit
What does “ulimit -l” mean?
Memory that is locked may not be paged out – this reduces the amount of memory that is available for other processes. This setting limits the amount of memory that can be locked.
Ulimits in Docker host vs container
The real limit will be 1048576. Have a look at the right part of this image, which shows that containers are basically just isolated processes, running on the same operating system: As every system call in the container will be handled directly by the host OS, the ulimit that is displayed (1048576) comes directly from … Read more
How to limit memory of a OS X program? ulimit -v neither -m are working
You can’t. Apple can (using the ledger() system call, which is private), but you can’t. I’m not entirely sure whether launchd’s options work or not – certainly if it was still using the code visible in the last open source version (from 10.9.5), it wouldn’t, because it calls setrlimit(), but it’s been substantially rewritten since … Read more
Python: ulimit and nice for subprocess.call / subprocess.Popen?
Use the preexec_fn parameter to subprocess.Popen, and the resource module. Example: parent.py: #!/usr/bin/env python import os import sys import resource import subprocess def setlimits(): # Set maximum CPU time to 1 second in child process, after fork() but before exec() print “Setting resource limit in child (pid %d)” % os.getpid() resource.setrlimit(resource.RLIMIT_CPU, (1, 1)) print “CPU … Read more
how to set ulimit / file descriptor on docker container the image tag is phusion/baseimage-docker
The latest docker supports setting ulimits through the command line and the API. For instance, docker run takes –ulimit <type>=<soft>:<hard> and there can be as many of these as you like. So, for your nofile, an example would be –ulimit nofile=262144:262144
What does “ulimit -s unlimited” do?
When you call a function, a new “namespace” is allocated on the stack. That’s how functions can have local variables. As functions call functions, which in turn call functions, we keep allocating more and more space on the stack to maintain this deep hierarchy of namespaces. To curb programs using massive amounts of stack space, … Read more
How to increase Neo4j’s maximum file open limit (ulimit) in Ubuntu?
What you are doing will not work for root user. Maybe you are running your services as root and hence you don’t get to see the change. To increase the ulimit for root user you should replace the * by root. * does not apply for root user. Rest is the same as you did. … Read more