-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 James,
On 2/12/20 4:53 PM, James H. H. Lampert wrote: > Here is a "Display Java Threads" from the Tomcat server's JVM job: > >> Total Aux Thread Name Status CPU >> I/O 00000011 main SELW 1.100 130 >> 00000014 JIT Compilatio > THDW 61.932 89 00000015 >> JIT Compilatio > THDW 96.846 77 00000016 JIT >> Compilatio > THDW 11.640 10 00000017 JIT Compilatio >> > THDW 1.350 2 00000018 JIT-SamplerThr > THDW >> 23.866 0 [...] >> 0000001D GC Slave THDW 187.726 157 0000001E >> GC Slave THDW 187.534 420 0000001F GC Slave >> THDW 187.862 217 00000020 GC Slave THDW >> 187.165 362 00000021 GC Slave THDW 187.572 >> 340 00000022 GC Slave THDW 187.686 333 >> 00000023 GC Slave THDW 187.870 161 I don't know up from down on an AS/400, but that certainly looks like both GC and JIT are tearing up your CPUs. What do those numbers in the "Total CPU" column mean? I that %-CPU like "thread 0000001D is using nearly 2 CPUs solid"? Or does that mean "thread 0000001D has had 187.726 seconds of activity since the process launched"? If this is a somewhat freshly launched JVM, you will see two things happen "early" in the process's lifetime: 1. Lots of heap re-sizing (because -Xms != -Xmx) before you get to a steady-state heap 2. Lots of JIT compilation because most of your Java code is being for the "first time" by the JVM (most JVMs don't cache JIT-compiled bytecode between process invocations ... except for the core classes in some more recent versions) So maybe everything above looks fine. *shrug* - -chris -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAl5Eg+kACgkQHPApP6U8 pFiCZg/9GWYpIEoob6+NllEPHErv1zu5/IwZXrqjUmgjv39j5F5/0+38F+lapUY1 u0wwNqcXuOyj44uRyxoE8uNL5RcOJUIJumAyoOtL3jtREyM+qWPJ3oEeQzUmNqQQ IlVXvZT0ALlG/eKSci747FbMAUk2Yp49r3EaTmn+KBOO3U04TVzpjbl0o1dupcjm ZI+52cbyrRHp9Myvz9s/r56SqLDSefoxGqrsFa8rBfHSIdFZft3hEE+LwY4iWO4T u9mnF1INr5CHBm2tIYHuXfSJGVw8LKVydYzp6ntRdLZ1l9inBLxbkDWihFzJn3fz nd9X9pPv34p3qMlqCaV9Ow7pxRXdFpUa8b/q6GOt9gR8V/SIHhrSX0gUA1dWuD2Q ROkenXUcaZcXa4jIWEw0/7v5wJaN4kYEzUuYfZdMmimSqLgVXCZn3L9584QlRDFo RFdAZ5Rbr3b0uy9cAm/EMlpXDuvGm4ARFBl2lG0q1R5B6yNsLXpbgaBGkI9YjLJx K8q4J11EJJH6hZ45tf3xV4MVlqD3MoVSLuuzj/eb/TD0iDFmeL31cpN0tCvG852R 1qOHhXXNKmvxH4toHthGxVWpKdDIlUSPtTXpq1Nn3NYCDme5IUKbetz9yV+qvrol lV1HPo2fUWglb1koFBCXEreC1MXqBev9wawlMeqPdunN3+n4t98= =1PqO -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
