安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- 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
- 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 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-XX:MaxPermSize=size Sets the maximum permanent generation space size This option was deprecated in JDK 8, and superseded by the -XX:MaxMetaspaceSize option Sizes are expressed in bytes Append the letter k or K to indicate kilobytes, m or M to indicate megabytes, g or G to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?
- How to extract the direct facebook video url - Stack Overflow
I am trying to extract the url for facebook video file page from the facebook video link but I am not able to proceed how For example: The facebook video url I have
- java - Where dump is dumped, using . . . - Stack Overflow
I found it hard to decipher what is meant by "working directory of the VM" In my example, I was using the Java Service Wrapper program to execute a jar - the dump files were created in the directory where I had placed the wrapper program, e g c:\myapp\bin The reason I discovered this is because the files can be quite large and they filled up the hard drive before I discovered their location
- Setting -XX:+DisableExplicitGC in production: what could go wrong?
You are not alone in fixing stop-the-world GC events by setting the -XX:+DisableExplicitGC flag Unfortunately (and in spite of the disclaimers in the documentation), many developers decide they know better than the JVM when to collect memory and introduce exactly this type of issue I'm aware of many instances where the -XX:+DisableExplicitGC improved the production environment and zero
- jvm hotspot - Does Javas ActiveProcessorCount limit the number of CPUs . . .
$ java -XX:ActiveProcessorCount=20 -cp Main Runtime getRuntime() availableProcessors() = 20 This also worked on the latest version of Java 8, specifically OpenJDK 1 8 0_242-b08 As already noted, this helps size thread pools but does not impose any hard limit on the number of CPU cores that can be used
- Is -XX:+UseG1GC the correct replacement for -Xincgc?
So what's the equivalent replacement for it? -XX:+UseG1GC? Background: The application has a heap of 8GB and creates a lot of short living objects I noticed that it often paused for some seconds to do garbage collection Out of curiosity I added the -Xincgc and found that the pauses were gone and overall performance improved ~4 times
|
|
|