examples of etl tools

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What tools to use to view memory overflow, with specific examples to explain the specific process

If the command is passed, it is generally called JPS to view the specific PID, then call Jstat to see the runtime memory, and the frequency of the GC, and then through Jstack to see if the thread is blocking, deadlock, looping, and so on, finally through Jmap generated heap snapshot to analyze memory overflow.With Visual Tools:In the case of jconsole, you can view the heap and the memory of each part through the memory window, and through the thread window you can see if the thread waits, loops,

Java Tools Class Dateutils examples

Date * @param imonth * Number of years to increase or decrease */public static Date Addyear (date date, int iyear) {Calendar cd = Calendar.getinstance (); Cd.settime (date); Cd.add (Calendar.year, iyear); return Cd.gettime (); }/** * Transforms the Object type to date * @param date * @return */public static date Chgobject (object date) {if (date!=null Amp;date instanceof Date) {return (date) date; } if (date!=nullAmp;date instanceof String) {return dateutils.stringtodate ((String)

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