I must say, I was impressed with the speed of the full GC. Blink of an eye fast.
> -----Original Message----- > From: Jeffrey Janner [mailto:jeffrey.jan...@polydyne.com] > Sent: Tuesday, November 09, 2010 9:51 AM > To: Tomcat Users List > Subject: RE: [OT] Jconsole Perform GC? > > Thanks Chuck. Just what I was interested in. > > > > -----Original Message----- > > From: Caldarale, Charles R [mailto:chuck.caldar...@unisys.com] > > Sent: Tuesday, November 09, 2010 9:05 AM > > To: Tomcat Users List > > Subject: RE: [OT] Jconsole Perform GC? > > > > > From: Jeffrey Janner [mailto:jeffrey.jan...@polydyne.com] > > > Subject: [OT] Jconsole Perform GC? > > > > > Anyone know what exactly what kind of GC the "Perform GC" > > > button in Jconsole does? > > > > The same one you get by calling System.gc() - a full GC. > > > > > The initial work was mostly in the Eden space and Survivor > > > spaces for most of the day, then suddenly, a big chunk > > > (nearly 4GB) ended up in the Old Gen space and pretty much > > > stayed there all night. > > > > Anything too big for the Eden space will be allocated directly in > > tenured. > > > > > Looking at the other individual graphs showed that there had > > > been several instances of GC performed by the JVM during that > > > time, but it took my manual instance to clear the Old Gen. > > > > Those were minor collections, cleaning out only the Eden space. > > > > > Is this just "normal" JVM GC processing? > > > > Yes, that's completely normal. The JVM will not do a major (full) GC > > unless it has to - or is forced by the API invocation. > > > > - Chuck > > > > > > THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE > > PROPRIETARY MATERIAL and is thus for use only by the intended > > recipient. If you received this in error, please contact the sender > and > > delete the e-mail and its attachments from all computers. > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > > For additional commands, e-mail: users-h...@tomcat.apache.org > > > > _______________________________________________________________________ > ___ > > Confidentiality Notice: This Transmission (including any attachments) > may contain information that is privileged, confidential, and exempt > from disclosure under applicable law. If the reader of this message is > not the intended recipient you are hereby notified that any > dissemination, distribution, or copying of this communication is > strictly prohibited. > > If you have received this transmission in error, please immediately > reply to the sender or telephone (512) 343-9100 and delete this > transmission from your system. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > __________________________________________________________________________ Confidentiality Notice: This Transmission (including any attachments) may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this transmission in error, please immediately reply to the sender or telephone (512) 343-9100 and delete this transmission from your system. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
