![]() On September 9th at 8:25:01 am, on machine ubuntu trigger CRON job with PID (process id) 15601 as user root. Here is a log file of syslog about the cron job I mentioned earlier Sep 9 08:25:01 ubuntu CRON: (root) CMD (if then munin-run apt_all update 7200 12 >/dev/null elif then munin-run apt update 7200 12 >/dev/null fi) Munin statistics update with cron job in 5 minute intervals, so after a while the graphs will look better. Here are few basic graphs, as you can see, while I had stress going on, the graphs were going high. But for example firefox uses 7.9 % of memory capacity (this isn’t the whole true though) Analyzing Munin statistics To set that up, press F2, then until you reach the Available meters column, move down to CPUs (1-8/16), press Enter, use the cursor keys to move the new entry to the desired position, and press Enter again do the same with CPUs (9-16/16). ![]() Apparently stress didn’t use any memory, which confuses me. htop version 3.0.0 and later allow the CPU metrics to be split into 16 columns. htop > text.txt) but it gives me text garbled by formatting strings (see below). ![]() I’m not quite sure why there are two processes running, but the main point is that we can analyze the load. Open the terminal application for the Ubuntu. 33 Ive tried piping htop to a text file (e.g. We can see that stress uses 24,4 and 19.9 % of maximum capacity. stress -cpu 8 -io 4 -vm 2 -vm-bytes 128m -timeout 20s This is why I inserted timeout to be 20 seconds. Stress will use all CPU Cores and load the machine quite heavily. Statisics look something like this without stressĪnd like this with stress. While stress is running, I’ll open another terminal window with htop. lockd is in-kernel daemon that manages NFS locking. D state code means that process is in uninterruptible sleep. When doing device I/O its the only way to go (otherwise data corruption could result). While this is running I will monitor base stats with htop sudo apt-get install stress -y In this state, a process doesnt wake up right away to process signals. Next I will apply stress to computer with program called stress. Under localdomain.localhost directory you’ll find various charts and statistics about your computers hardware usage. This will open up directory of munin statistic files. Then I’ll open munin data with browser by entering file:///var/cache/munin/www to browser Next install munin and munin-node sudo apt-get install munin -y I’ll be using Ubuntu 14.04 live boot USB stick on a computer with following specs:įirst upgrade and update your Ubuntu sudo apt-get update Using the htop utility, the user can view the crucial details about the Ubuntu system such as CPU running processes, memory utilization, load average, PID’s, etc. In this blog post I will be monitoring Ubuntu 14.04 with various tools and stressing it out with stress. Htop is the improved version of the top command-line utility.
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