-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 This option was deprecated in JDK 8, and superseded by the -XX:MaxMetaspaceSize option.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?

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.

2014年9月26日 · 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.

2015年11月25日 · Unfortunately, when searching for Java tuning pages on the Web, there are many documents that recommend the use of CMS in incremental mode by setting one of the command-line switches-XX:+CMSIncrementalMode or -Xincgc.

2015年7月16日 · As I commented on the previous answer the reasons for setting a limit on those memory pools is different.. If your users previously increased the MaxPermSize above the default that probably was either to avoid Full GCs / concurrent mode failures with CMS or because their applications genuinely needed a lot of perm gen space.

2013年2月7日 · The flag Xmx specifies the maximum memory allocation pool for a Java Virtual Machine (JVM), while Xms specifies the initial memory allocation pool.

2017年3月27日 · I am querying social security number data from a stored procedure and I would like to format it as a social security number in my stored procedure. How can I format xxxxxxxxx like xxx-xx-xxxx in O...

2016年3月22日 · -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

Developer options:Options that begin with -XX are developer options and often have specific system requirements for correct operation and may require privileged access to system configuration parameters; they are not recommended for casual use. These options are also subject to change without notice.

2020年1月16日 · This method will get the video and its audio AS SEPARATE FILES. The downloaded video will have no sound, but you will be able to download its audio file and connect it to the video in some video editing program if you need to.