find -size -X | xargs rm -f;

-size n[cwbkMG]
File uses n units of space. The following suffixes can be used:

`b’ for 512-byte blocks (this is the default if no suffix is used)

`c’ for bytes

`w’ for two-byte words

`k’ for Kilobytes (units of 1024 bytes)

`M’ for Megabytes (units of 1048576 bytes)

`G’ for Gigabytes (units of 1073741824 bytes)

The size does not count indirect blocks, but it does count blocks in sparse files that are not actually allocated. Bear in
mind that the `%k’ and `%b’ format specifiers of -printf handle sparse files differently. The `b’ suffix always denotes
512-byte blocks and never 1 Kilobyte blocks, which is different to the behaviour of -ls.

http://java.sun.com/developer/technicalArticles/Programming/PerfTuning/

ChainedFilter dateFilterChained = null;
Filter[] dateChain = new Filter[1];
Calendar c1 = Calendar.getInstance();
Date now = c1.getTime();
c1.add(Calendar.DATE, +30);
Date end = c1.getTime();

SimpleDateFormat sdf = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”);
String startString;
String endString;
endString = sdf.format(end);
startString = sdf.format(now);
dateChain[0] = FieldCacheRangeFilter.newStringRange(“startdate”, startString, endString, true, true);
int isInRangeLogicArray[] = new int[1];
isInRangeLogicArray[0]= ChainedFilter.OR;
dateFilterChained = new ChainedFilter(dateChain, isInRangeLogicArray);
filterList.add(dateFilterChained);

}