There is a Profile the IDE button next to the Memory Gauge. Start
profiling when the CPU usage spikes, let it run for a minute or so, then
stop the profiling. You will see what is happening behind the scenes.
That data can be exported as well, just zip that, create an issue in the
JIRA and attach the report, so developers can analyze that as well.
On 10/20/21 09:54, Thomas Wolf wrote:
I have NB 12.4, but I have noticed the same behavior on previous NBs
as well:
Most of the time, my MacBook Pro is quiet as can be. But every now
and then (every other day?), I’d be surfing the web or reading the
mail when my fans start spinning up - often getting to their max speed
*and staying there*. Usually, I’m not doing anything CPU intensive at
all and when I look at the Activity Monitor, it’s always Netbeans
taking 100-200% of the CPU. And *always*, when open the Netbeans
window, there at the bottom would be a message indicating that NB is
checking (or waiting? can’t remember the exact wording) for external
changes. I assume that’s the NB feature that checks to see if any
project-related source was modified outside the IDE? This has got to
be a bug - there’s no way something like that should be a heavy load
on a CPU.
Is there something I can do when I next observe this behavior to help
track down this bug? I think I’ve had this happen for at least a
year. If there isn’t - is there a way to globally turn it off?
I’m on macOS 12.0.1 (Monterey) running NB with OpenJDK 17, but as I
said, this has happened on earlier NB and earlier versions of Java.
My computer is standalone - i.e. no corporate network, not networked
file systems. Just the laptop and a wireless connection to the
Internet (via Starlink and, before that, via Verizon LTE).
Thanks for any suggestions,
Tom
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