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Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12
... the crash you may need to setup a swap space for your micro instance. Actually performance wise is better to enable swap.
Steps below show how to make a swap space for your Micro instance. I assume you have AWS Account with a Micro instance running.
Run dd if=/dev/zero of=/swapfile bs=1M count=102...
C state-machine design [closed]
I am crafting a small project in mixed C and C++. I am building one small-ish state-machine at the heart of one of my worker thread.
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How to read the Stock CPU Usage data
... screen, showing how much the CPU is being used. The top red bar shows overall CPU usage, and the green bar underneath it shows the CPU time spent in compositing the screen. Note: You cannot turn this feature off once it is on, without restarting the emulator. developer.android.com/tools/debugging/...
setMaxResults for Spring-Data-JPA annotation?
...Not sure if limit is supported in Hibernate: forum.hibernate.org/viewtopic.php?f=9&t=939314
– Witold Kaczurba
Apr 28 '17 at 12:38
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HTML/CSS: Making two floating divs the same height
... peculiar problem that I currently solve using a table , see below. Basically, I want to have two divs take up 100% of the available width, but only take up as much vertical space as needed (which isn't really that obvious from the picture). The two should at all times have the exact same height ...
Encrypt Password in Configuration Files? [closed]
...simple way of doing this is to use Password Based Encryption in Java. This allows you to encrypt and decrypt a text by using a password.
This basically means initializing a javax.crypto.Cipher with algorithm "AES/CBC/PKCS5Padding" and getting a key from javax.crypto.SecretKeyFactory with the "PBKDF...
MySQL Query GROUP BY day / month / year
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Oh god, if I knew this earlier...so many lines of PHP to do something mysql can do in one line.
– nights
Nov 1 '18 at 3:01
add a comment
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How can I extract audio from video with ffmpeg?
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FWIW, I have crafted a PHP script, so that I just specify the input video file, and it automatically determines the extension of the output audio file: superuser.com/questions/1301901/…
– Gras Double
Jul 22 ...
How do you make a web application in Clojure? [closed]
... is Compojure: http://github.com/weavejester/compojure/tree/master
It's small but powerful, and has beautifully elegant syntax. (It uses Jetty under the hood, but it hides the Servlet API from you unless you want it, which won't be often). Go look at the README at that URL, then download a snapshot...
doGet and doPost in Servlets
...ould use doPost() when you want to intercept on HTTP POST requests. That's all. Do not port the one to the other or vice versa (such as in Netbeans' unfortunate auto-generated processRequest() method). This makes no utter sense.
GET
Usually, HTTP GET requests are idempotent. I.e. you get exactly t...