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How many system resources will be held for keeping 1,000,000 websocket open? [closed]
...r used more than 13 GiB of RAM and the CPU was stable around 60%.
With at least 30 GiB RAM you can handle 1 million concurrent sockets. The CPU needed depends on the data throughput you need.
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Cannot import XSSF in Apache POI
...ooxml-3.17.jar
to your project, as that seems to make it work (for me at least)
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Relative imports in Python 3
...setting __package__ alone is not enough. You're going to need to import at least N preceding packages in the module hierarchy, where N is the number of parent directories (relative to the directory of the script) that will be searched for the module being imported.
Thus,
Add the parent directory ...
Difference between toFixed() and toPrecision()?
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In at least some cases, this is not correct: in my Firefox, with a = 999999999999999934464;, a.toFixed(0) returns "1e+21". Perhaps a more accurate answer would be that toFixed() does not return exponential notation unless toString(...
Show a number to two decimal places
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if you want to use number_format at least make it number_format($number, 2, '.', '')
– Mihai P.
Oct 31 '16 at 20:51
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Medium-size Clojure sample application?
...but there's probably subsections of it that are small that would work. At least, that's going to be my approach. smiles
Also, check out
http://github.com/technomancy/mire/tree/master
which is a small m.u.d. client prototype built in clojure, the advantage being that it's totally self-contained,...
Using wget to recursively fetch a directory with arbitrary files in it
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When you are ignoring robots.txt you should at least throttle your requests. The behaviour suggested in this answer is highly impolite.
– Nobody
Nov 19 '19 at 9:22
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Do you (really) write exception safe code? [closed]
... first exception thrown.
basic: This is the guarantee you must at the very least offer, that is, if an exception is thrown, no resources are leaked, and all objects are still whole
strong: The processing will either succeed, or throw an exception, but if it throws, then the data will be in the same ...
Tactics for using PHP in a high-load site
...expensive (more servers).
INDEXING
Make sure that your queries utilize at least one index. Beware though, that indexes will cost you if you write or update frequently. There are some experimental tricks to avoid this.
You can try adding additional columns that aren't indexed which run parallel to...
How to format a float in javascript?
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instead of '0.6'.
Second, there's an IE bug with toFixed(). In IE (at least up to version 7, didn't check IE8), the following holds true:
(0.9).toFixed(0) === '0'
It might be a good idea to follow kkyy's suggestion or to use a custom toFixed() function, eg
function toFixed(value, precision)...