25 I am getting a social security number (SSN) from a data warehouse. While posting it to a CRM I want it to be formatted like XXX-XX-XXXX instead of XXXXXXXXX. It's like converting a simple string with dashes at positions 4 and 7. I am pretty new to C , so what is the best way to do this? The message *Host ''xxx.xx.xxx.xxx'' is not allowed to connect to this MySQL server is a reply from the MySQL server to the MySQL client. Notice how its returning the IP address and not the hostname. 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. -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 This option was deprecated in JDK 8, and superseded by the -XX:MaxMetaspaceSize option.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? JVM flag -XX:+UnlockExperimentalVMOptions, is this removed from the latest JDK8 (Update 265)? Ask Question Asked 5 years, 8 months ago Modified 5 years, 8 months ago Notice that you can play around with the fields you're querying for, the username and the objects you're requesting (in this case, videos). However, also notice that you must create your own access tokens and that queries you make will have your name on them, (so don't abuse this). You can play around (and create your own access token) with Facebook's API in their Graph Explorer Tool: https. If the OutOfMemoryError is caused by allocating a direct byte buffer than the JVM flag -XX:+ExitOnOutOfMemoryError is ignored. Checked on Oracle JDK and OpenJDK Java. 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 is the difference between -XX:MaxPermSize and -XX:MaxMetaspaceSize options in terms of memory settings? The difference between -XX:MaxPermSize and -XX:MaxMetaspaceSize is largely moot. -XX:MaxPermSize was for sizing the old permanent generation (PermGen) heap. This was removed in Java 8. XX:MaxMetaspaceSize is for sizing the new Metaspace off-heap memory space that is used by the JVM. Error: The processing instruction target matching [xX] [mM] [lL] is not allowed Asked 12 years, 7 months ago Modified 2 years, 2 months ago Viewed 396k times.