in jvm, the range of short is much smaller than that of int, but it takes up the same size of slot as int. Is the storage mode of short a legendary complement, in order to improve the query speed ?...
After the 1.Java class file is compiled, there will be a class constant pool 2. During class loading, the class constant pool is loaded into the runtime constant pool so does this runtime pool have one for each class, or does all classes share one? ...
Why is there a sudden increase in hop time and no increase in YGC and FGC when using the jstat-gcutil monitor gc? S0 S1 E O M CCS YGC YGCT FGC FGCT GCT 40.57 0.00 0.00 96.12 94.08 91.92 254 59.554 ...
such as the title. Ask the boss to answer. ...
problem description when I use a K8s private cloud, the kernel s OOM is always triggered due to memory limitations in jvm and docker. But after triggering the OOM of the kernel, dockerd may die, completely unresponsive. docker images can be use...
if you are in use, you will not get stuck when developing software. If you stay idle for a period of time and then use it, there will be no response. The ini of the development tools has also been changed and is of no use. My computer has 8g of memory, ...
I customize a class test. Which class loader loads this class. if I want all classes to be loaded by a custom class loader. How to achieve. Hurry! ...
how does intellij modify the source code of maven jar packages, what plug-ins or other ways do you use ...
is shown below: both the meta-space utilization M and the compressed space utilization CCS are above 95%. What does this mean? Is there a problem? the number of full gc is small, only a few times in many days [root@localhost eversec]-sharp cat temp ...
as shown below, metaspace and CCS account for more than 90%. Does this have a great impact on the process? How to deal with it? $JAVA_HOME bin jstat-gcutil 27553 S0 S1 E OM CCS YGC YGCT FGC FGCT GCT 0.00 100.00 13.05 97.12 94.61 9 0.306 3 0.469 0.77...
question 1: String s = new String ( "abc "); where did you create what? question 2: String s = "abc "; String s = new String ( "abc "); where are these two statements created? question 3: String S1 = "abc "; String S2 = "abc "; are S1 and S2 e...
if you dump through a thread, you can only get information at a certain point in time (incomplete). But if you use JVM monitoring tool sampling, looking for a specific method after the implementation process is too troublesome, is there any other way? ...
the most common passage about CMSFullGCsBeforeCompaction, is: < hr > CMSFullGCsBeforeCompaction is talking about how many more times full GC has to be executed before compression has been done since the last CMS concurrent GC execution. The default is...
what s the difference between CMSInitiatingOccupancyFraction and CMSTriggerRatio as the name implies, it feels like the same concept ...
jvm has its own gc strategy, so what s the point of using System.gc ()? ...
public class A{ public static void main(String[] args){ B b = new B(); } } public class B{ int i; C c; B(){ i = 1; c = new C(); } } public class C{ } it is generally said that the reference is on the st...
for example, how does java.lang.Object-sharpwait (), locate it in the jvm source code? ...
you can modify the jvm parameters of an application in catalina.sh by declaring JAVA_OPTS, at the beginning of tomcat. Here are two places I do not quite understand, ask the bosses to advise: 1. If you set the jvm maximum heap memory limit to 2G here, d...
as mentioned above, I understand that the benefits of runtime compilation can be that you can save startup time and do hot deployment hot replacement (such as jsp hot replacement) , but in fact, when website development does not need jsp, to launch, the ...
< H1 > Hello, everyone. I just watched a video tutorial. I have a question < H1 >. Video tutorial. Is it true to say that stack data can be shared in jmm? I remember that the data in the heap can be shared. Is he wrong? ...
as shown in the figure there should be only one a, but it is normal to use find, using $( - sharpcrumbs a ). Size () shows 2. What is the reason? ...
request of the requested object ...
the front-end javascript is encrypted with CryptoJS, and then decrypts the ciphertext. Why is it empty? the following is the code written: import CryptoJS from "crypto-js"; const key = CryptoJS.enc.Utf8.parse("1234123412ABCDEF");...
because sed outputs all the data rows by default, sed s pattern command a pattern command GO process, and the data that is not matched is output normally I want to continue editing the rows that have just been matched after sed executes a patte...
1. the local dev build of this vue project can be run, and the console does not report an error. upload to github, I want to make a preview page via page. Result 404, and there is no specific reason for reporting an error http: lustforlife.cn...