Ron, We haven't heard of any issues like you describe. Have you tried running your application with Java Flight Recorder <https://docs.oracle.com/javacomponents/jmc-5-4/jfr-runtime-guide/run.htm#JFRUH176>? This should help diagnose what is going on.
Remko On Mon, Feb 13, 2017 at 9:59 PM, DiFrango, Ronald < ronald.difra...@capitalone.com> wrote: > All, > > We recently upgrade to 2.6 and noticed a dramatic increase in CPU and > Thread utilization that seems to be tied to the new “garbage free” mode of > log4j 2.6. Here’s some of the baseline numbers: > > > · Log4j 2.5: CPU typically ran around 25% > > · Log4j 2.6: CPU typically ran around 75% > > · Log4j 2.6.2+: CPU typically ran around 100% > > · We’ve also tried turning off garbage free mode and that made > things worse as the CPU was around 120% and caused us to not meet our SLA’s > > It important to note that this is a REST Api using Jersey and typically > responds in about in under 50ms on a per request so its high volume, but > the logging level is WARN or higher except for our single performance log > record which is written once per request using the lambda base approach. > > Our next test is going to be switching to all ASYNC loggers and see what > effect that has, but I guess the general question is, has anyone else seen > this? Any thoughts? > > Ron DiFrango > ________________________________________________________ > > The information contained in this e-mail is confidential and/or > proprietary to Capital One and/or its affiliates and may only be used > solely in performance of work or services for Capital One. The information > transmitted herewith is intended only for use by the individual or entity > to which it is addressed. If the reader of this message is not the intended > recipient, you are hereby notified that any review, retransmission, > dissemination, distribution, copying or other use of, or taking of any > action in reliance upon this information is strictly prohibited. If you > have received this communication in error, please contact the sender and > delete the material from your computer. >
