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!
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- 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
- 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
- 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
- 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
- SSN Regex for 123-45-6789 OR XXX-XX-XXXX - Stack Overflow
Can someone provide me a regex for SSN that matches either 123-45-6789 OR XXX-XX-XXXX I currently have ^\d{3}-?\d{2}-?\d{4}$ which matches the first expression, but I need to add the second expression to it as an alternative Thanks!
- JVM flag -XX:+UnlockExperimentalVMOptions, is this removed from the . . .
$ java -XX:+PrintFlagsFinal -version | grep UnlockExperimentalVMOptions openjdk version "1 8 0_265" OpenJDK Runtime Environment (build 1 8 0_265-8u265-b01-0ubuntu2~20 04-b01) OpenJDK 64-Bit Server VM (build 25 265-b01, mixed mode) Is the flag UnlockExperimentalVMOptions removed or Am I doing something wrong or what??
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