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- c++ - . c vs . cc vs. . cpp vs . hpp vs . h vs . cxx - Stack Overflow
Historically, the first extensions used for C++ were c and h, exactly like for C This caused practical problems, especially the c which didn't allow build systems to easily differentiate C++ and C files
- 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-XX:MaxPermSize=size Sets the maximum permanent generation space size This option was deprecated in JDK 8, and superseded by the -XX:MaxMetaspaceSize option Sizes are expressed in bytes Append the letter k or K to indicate kilobytes, m or M to indicate megabytes, g or G to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?
- 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
- 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
- Difference between -XX:+UseParallelGC and -XX:+UseParNewGC
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
- Increase heap size in Java - Stack Overflow
-XX:MaxRAMPercentage=percent The MaxRAMPercentage parameter allows setting the maximum heap size for a JVM running with a large amount of memory (greater than 200 MB) This is the option that can be used for the case mentioned in the question:-XX:MaxRAMPercentage=75 -XX:MinRAMPercentage=percent
- Mockito is currently self-attaching to enable the inline-mock-maker . . .
I added the above XML snippet to my pom xml and added the argument -XX:+EnableDynamicAgentLoading to the VM parameters All warnings were cleared except the first line Mockito is currently self-attaching to enable the inline-mock-maker The XML snippets didn't have any effect Any help would be appreciated –
- What are ReservedCodeCacheSize and InitialCodeCacheSize?
The OP of this post wrote: >-XX:ReservedCodeCacheSize=32m Reserved code cache size (in bytes) - maximum code cache size [Solaris 64-bit, amd64, and -server x86: 48m; in 1 5 0_06 and earlier, Solaris 64-bit and and64: 1024m ] I just want to correct that the mentioned upper limit at 48m must be a typo It's 2048m –
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