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- c++ - . c vs . cc vs. . cpp vs . hpp vs . h vs . cxx - Stack Overflow
Possible Duplicates: * h or * hpp for your class definitions What is the difference between cc and cpp file suffix? I used to think that it used to be that: h files are header files for C and C
- Difference between -XX:+UseParallelGC and -XX:+UseParNewGC
3 Using -XX:+UseParNewGC along with -XX:+UseConcMarkSweepGC, will cause higher pause time for Minor GCs, when compared to -XX:+UseParallelGC This is because, promotion of objects from Young to Old Generation will require running a Best-Fit algorithm (due to old generation fragmentation) to find an address for this object
- Difference between Xms and Xmx and XX:MaxPermSize
-XX:MaxPermSize=size Sets the maximum permanent generation space size This option was deprecated in JDK 8, and superseded by the -XX:MaxMetaspaceSize option Sizes are expressed in bytes Append the letter k or K to indicate kilobytes, m or M to indicate megabytes, g or G to indicate gigabytes References: How is the java memory pool divided?
- What are the -Xms and -Xmx parameters when starting JVM?
The flag Xmx specifies the maximum memory allocation pool for a Java Virtual Machine (JVM), while Xms specifies the initial memory allocation pool This means that your JVM will be started with Xms amount of memory and will be able to use a maximum of Xmx amount of memory For example, starting a JVM like below will start it with 256 MB of memory and will allow the process to use up to 2048 MB
- Decoding facebooks blob video url - Stack Overflow
This method will get the video and its audio AS SEPARATE FILES The downloaded video will have no sound, but you will be able to download its audio file and connect it to the video in some video editing program if you need to In Google Chrome, go to Facebook Open the Chrome Developer Tools (F12) Go to the Network tab in the Developer Tools (it's at the top of the Developer Tools window
- Cannot create JVM with -XX:+UseLargePages enabled
10 I have a Java service that currently runs with a 14GB heap I am keen to try out the -XX:+UseLargePages option to see how this might affect the performance of the system I have configured the OS as described by Oracle using appropriate shared memory and page values (these can also be calculated with an online tool)
- Understanding the output of -XX:+PrintCompilation - Stack Overflow
I have used -XX:+PrintCompilation, and -verbose:gc flags to ensure that nothing is happening in the background when the timing is being run However, I see something in the output which I cannot understand
- Regular Expression to validate xx-xxxxxxx or xxx-xx-xxxx
string1 = xxx-xx-xxxx or string1 = xx-xxxxxxx How can I make the regex accept both kinds of values for the same element? The x's represent numbers only so total number of digits = 9 (anything between 0-9) total number of elements in the value is either 11 or 10 depending on which format and total number of dashes is either 2 or 1
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