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How to determine CPU and memory consumption from inside a process?
I once had the task of determining the following performance parameters from inside a running application:
9 Answers
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mysql_config not found when installing mysqldb python interface
...one Building dependency tree Reading state information...Done Note, selecting libmysqlclient15-dev instead of libmysqlclient-dev Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required...
What are carriage return, linefeed, and form feed?
... beginning of the current line without advancing downward. The name comes from a printer's carriage, as monitors were rare when the name was coined. This is commonly escaped as \r, abbreviated CR, and has ASCII value 13 or 0x0D.
Linefeed means to advance downward to the next line; however, it has...
How to use ssh agent forwarding with “vagrant ssh”?
...n suggested didn't help... What worked for me was adding keys to keychain from my host OS and disabling config.ssh.private_key_path assignment.
– alexserver
Oct 27 '15 at 5:06
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Do I use , , or for SVG files?
... function() {
var doc = this.getSVGDocument();
var rect = doc.querySelector("rect"); // suppose our image contains a <rect>
rect.setAttribute("fill", "green");
});
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detect key press in python?
...windows and were struggling to find an working answer here's mine: pynput
from pynput.keyboard import Key, Listener
def on_press(key):
print('{0} pressed'.format(
key))
def on_release(key):
print('{0} release'.format(
key))
if key == Key.esc:
# Stop listener
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How to specify test directory for mocha?
..., also plays nicely with the Webstorm IDE mocha debug configurations, just select "file patterns" and leave the input empty, and it will use mocha.opts
– danday74
Jul 28 '17 at 5:43
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System.currentTimeMillis vs System.nanoTime
...() gives you a nanosecond-precise time, relative to some arbitrary point.
From the Java Documentation:
public static long nanoTime()
Returns the current value of the most precise available system timer, in nanoseconds.
This method can only be used to
measure elapsed time and is not
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Warning: mysql_connect(): [2002] No such file or directory (trying to connect via unix:///tmp/mysql.
...dit config files, and have to remember to keep edited files local and away from servers where the paths are correct, simply create a symbolic link so your Mac finds the required socket, even when it's looking in the wrong place!
If you have /tmp/mysql.sock but no /var/mysql/mysql.sock then...
cd /...
Hadoop “Unable to load native-hadoop library for your platform” warning
...
The answer depends... I just installed Hadoop 2.6 from tarball on 64-bit CentOS 6.6. The Hadoop install did indeed come with a prebuilt 64-bit native library. For my install, it is here:
/opt/hadoop/lib/native/libhadoop.so.1.0.0
And I know it is 64-bit:
[hadoop@VMWHADTES...