IIRC, mlockall doesn't work as a non root user on Linux.
Memory locking is permitted for non-root on modern Linux, but is
subject to resource limitations (ulimit -l). I believe this also
applies to mlockall() (and not just mlock()), provided that you lock
MCL_CURRENT rather than MCL_FUTURE
The main reason to set Xms=Xmx is so mlockall can tag the entire heap
as don't swap this out on startup. Secondarily whenever the heap
resizes upwards the JVM does a stop-the-world gc, but no, not really a
big deal when your uptime is in days or weeks.
I'm not sure where this is coming from,
Heap *shrinkage* on the other hand is another matter and for both CMS
and G1, shrinkage never happens except on Full GC, unfortunately. I'm
And to be clear, the implication here is that shrinkage normally
doesn't happen. The implication is *not* that you see fallbacks to
full GC for the purpose
Hi all,
do you know any component for client-side sorting of cassandra structures?
Like order groups of SuperColumn on the base of a value of SubColumn and
similar operations? (ordering by asciitype/bytestype and so on) ...
Do you know anything like this? I'd like to avoid DTO/VO pattern +
