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Stress-ng: info: dispatching hogs: 16 cpu Stress-ng -cpu 4 -io 2 -vm 1 -vm-bytes 1G -timeout 60s -metrics-brief

To run for 60 seconds with 4 cpu stressors, 2 io stressors and 1 vm stressor using 1GB of virtual memory, enter: Note that this can cause systems to trip the kernel OOM killer on Linux systems if not enough physical memory and swap is not available. The -vm 2 will start N workers (2 workers) continuously calling mmap/munmap and writing to the allocated memory. Stress-ng -vm 2 -vm-bytes 1G -timeout 60s One can specify the size as % of total available memory or in units of Bytes, KBytes, MBytes and GBytes using the suffix b, k, m or g: Use mmap N bytes per vm worker, the default is 256MB. Stress-ng -disk 2 -io 2 -timeout 60s -metrics-brief Unix / Linux memory stress test One can pass the -io N option to the stress-ng command to commit buffer cache to disk: Stress-ng -disk 2 -timeout 60s -metrics-brief Stress-ng -cpu 4 -timeout 60s -metrics-briefįor disk start N workers continually writing, reading and removing temporary files: Let us start N workers exercising the CPU by sequentially working through all the different CPU stress methods: Install stress on a CentOS, RHEL, and Fedora Linuxįirst, turn on EPEL repo and then type the following yum command to install the same:Īlways note down the output of uptime command before starting it: You can install stress as part of the Linux or Unix distribution. The tool is known to work on x86 Linux and FreeBSD/OpenBSD, powerpc AIX and Linux, SPARC Solaris, Compaq Alpha Tru64 UNIX, and many others. This program is supposed to be easy to use and recommended for new sysadmins. Getting started with stress tool on Linux Also, note that tools will stress out your server resources quickly so use the following command judiciously. Warning: Running the following tools with root privileges is recommended to avoid out of memory and other errors.