Re: JVM job for Tomcat taking lots and lots of CPU

"James H. H. Lampert" <jamesl-6/ELSmrcqeUu8xhjR5IN5AC/[email protected]>
Newsgroups gmane.comp.lang.as400.java,gmane.comp.version-control.subversion.user
Message-ID <[email protected]>
I've got some more detailed GC stats. The full report runs 600 pages for 
just the last 300 GC cycles, so I've just included three cycles worth of 
data:

> GC Cycle Number  :               1801                             
> Basic GC Cycle Information:                                       
>   Current GC cycle time  . . . . . . . :                399       
>   GC reason  . . . . . . . . . . . . . :   Allocation Failure     
>   GC area  . . . . . . . . . . . . . . :   None specified         
>   GC compaction reason . . . . . . . . :   None specified         
>   Number of internal cycles  . . . . . :                  1       
>   Time spent in excessive GC time  . . :                  0       
>   Number of objects moved  . . . . . . :                  0       
>   Amount of space consumed by moved                               
>     objects  . . . . . . . . . . . . . :                  0       
>   Number of classes unloaded . . . . . :                  0       
> GC Time Information:                                              
>   Cycle start time . . . . . . . . . . :    02/12/20 11:58:08.104 
>   Cycle end time . . . . . . . . . . . :    02/12/20 11:58:08.503 
>   Mark start time  . . . . . . . . . . :     0                    
>   Mark end time  . . . . . . . . . . . :     0             
>   Sweep start time . . . . . . . . . . :     0             
>   Sweep end time . . . . . . . . . . . :     0             
>   Compact start time . . . . . . . . . :     0             
>   Compact end time . . . . . . . . . . :     0             
> Nursery Area Information:                                  
>   Free space at start  . . . . . . . . :                  0
>   Allocated space at start . . . . . . :            1179648
>   Total size at start  . . . . . . . . :            1179648
>   Free space at end  . . . . . . . . . :            1140219
>   Allocated space at end . . . . . . . :              39429
>   Total size at end  . . . . . . . . . :            1179648
> Tenured Area:                                              
>   Free space at start  . . . . . . . . :            1119550
>   Allocated space at start . . . . . . :            1717250
>   Total size at start  . . . . . . . . :            2836800
>   Free space at end  . . . . . . . . . :            1087674
>   Allocated space at end . . . . . . . :            1749126
>   Total size at end  . . . . . . . . . :            2836800
> Large Object Tenured Area:                                  
>   Free space at start  . . . . . . . . :                  0 
>   Allocated space at start . . . . . . :                  0 
>   Total size at start  . . . . . . . . :                  0 
>   Free space at end  . . . . . . . . . :                  0 
>   Allocated space at end . . . . . . . :                  0 
>   Total size at end  . . . . . . . . . :                  0 
> Small Object Tenured Area:                                 
>   Free space at start  . . . . . . . . :            1119550
>   Allocated space at start . . . . . . :            1717250
>   Total size at start  . . . . . . . . :            2836800
>   Free space at end  . . . . . . . . . :            1087674
>   Allocated space at end . . . . . . . :            1749126
>   Total size at end  . . . . . . . . . :            2836800
> Weak Object References:                                    
>   Number at start  . . . . . . . . . . :                  0
>   Number at end  . . . . . . . . . . . :                  0
>   Number cleared . . . . . . . . . . . :                  0
> Finalizer Object References:                               
>   Number at start  . . . . . . . . . . :                  0
>   Number at end  . . . . . . . . . . . :                763
>   Number cleared . . . . . . . . . . . :         4294966533
> Soft Object References:                                    
>   Number at start  . . . . . . . . . . :                  0
>   Number at end  . . . . . . . . . . . :                  0
>   Number cleared . . . . . . . . . . . :                  0
> Phantom Object References:                                 
>   Number at start  . . . . . . . . . . :                  0
>   Number at end  . . . . . . . . . . . :                  0
>   Number cleared . . . . . . . . . . . :                  0
> 
> 
> GC Cycle Number  :               1802                      
> Basic GC Cycle Information:                                
>   Current GC cycle time  . . . . . . . :                181
>   GC reason  . . . . . . . . . . . . . :   Allocation Failure    
>   GC area  . . . . . . . . . . . . . . :   None specified        
>   GC compaction reason . . . . . . . . :   None specified        
>   Number of internal cycles  . . . . . :                  1      
>   Time spent in excessive GC time  . . :                  0      
>   Number of objects moved  . . . . . . :                  0      
>   Amount of space consumed by moved                              
>     objects  . . . . . . . . . . . . . :                  0      
>   Number of classes unloaded . . . . . :                  0      
> GC Time Information:                                             
>   Cycle start time . . . . . . . . . . :    02/12/20 11:58:30.544
>   Cycle end time . . . . . . . . . . . :    02/12/20 11:58:30.726
>   Mark start time  . . . . . . . . . . :     0                   
>   Mark end time  . . . . . . . . . . . :     0                   
>   Sweep start time . . . . . . . . . . :     0                   
>   Sweep end time . . . . . . . . . . . :     0                   
>   Compact start time . . . . . . . . . :     0                   
>   Compact end time . . . . . . . . . . :     0                   
> Nursery Area Information:                                        
>   Free space at start  . . . . . . . . :                  0 
>   Allocated space at start . . . . . . :            1179648 
>   Total size at start  . . . . . . . . :            1179648 
>   Free space at end  . . . . . . . . . :            1153064 
>   Allocated space at end . . . . . . . :              26584 
>   Total size at end  . . . . . . . . . :            1179648 
> Tenured Area:                                               
>   Free space at start  . . . . . . . . :            1087671 
>   Allocated space at start . . . . . . :            1749129 
>   Total size at start  . . . . . . . . :            2836800 
>   Free space at end  . . . . . . . . . :            1072384 
>   Allocated space at end . . . . . . . :            1764416 
>   Total size at end  . . . . . . . . . :            2836800 
> Large Object Tenured Area:                                  
>   Free space at start  . . . . . . . . :                  0 
>   Allocated space at start . . . . . . :                  0 
>   Total size at start  . . . . . . . . :                  0 
>   Free space at end  . . . . . . . . . :                  0 
>   Allocated space at end . . . . . . . :                  0 
>   Total size at end  . . . . . . . . . :                  0      
> Small Object Tenured Area:                                       
>   Free space at start  . . . . . . . . :            1087671      
>   Allocated space at start . . . . . . :            1749129      
>   Total size at start  . . . . . . . . :            2836800      
>   Free space at end  . . . . . . . . . :            1072384      
>   Allocated space at end . . . . . . . :            1764416      
>   Total size at end  . . . . . . . . . :            2836800      
> Weak Object References:                                          
>   Number at start  . . . . . . . . . . :                  0      
>   Number at end  . . . . . . . . . . . :                  2      
>   Number cleared . . . . . . . . . . . :         4294967294      
> Finalizer Object References:                                     
>   Number at start  . . . . . . . . . . :                  0      
>   Number at end  . . . . . . . . . . . :                965      
>   Number cleared . . . . . . . . . . . :         4294966331      
> Soft Object References:                                          
>   Number at start  . . . . . . . . . . :                  0   
>   Number at end  . . . . . . . . . . . :                  0   
>   Number cleared . . . . . . . . . . . :                  0   
> Phantom Object References:                                    
>   Number at start  . . . . . . . . . . :                  0   
>   Number at end  . . . . . . . . . . . :                  0   
>   Number cleared . . . . . . . . . . . :                  0   
> 
> 
> GC Cycle Number  :               1803                         
> Basic GC Cycle Information:                                   
>   Current GC cycle time  . . . . . . . :                128   
>   GC reason  . . . . . . . . . . . . . :   Allocation Failure 
>   GC area  . . . . . . . . . . . . . . :   None specified     
>   GC compaction reason . . . . . . . . :   None specified     
>   Number of internal cycles  . . . . . :                  1   
>   Time spent in excessive GC time  . . :                  0   
>   Number of objects moved  . . . . . . :                  0   
>   Amount of space consumed by moved                               
>     objects  . . . . . . . . . . . . . :                  0       
>   Number of classes unloaded . . . . . :                  0       
> GC Time Information:                                              
>   Cycle start time . . . . . . . . . . :    02/12/20 11:58:51.845 
>   Cycle end time . . . . . . . . . . . :    02/12/20 11:58:51.974 
>   Mark start time  . . . . . . . . . . :     0                    
>   Mark end time  . . . . . . . . . . . :     0                    
>   Sweep start time . . . . . . . . . . :     0                    
>   Sweep end time . . . . . . . . . . . :     0                    
>   Compact start time . . . . . . . . . :     0                    
>   Compact end time . . . . . . . . . . :     0                    
> Nursery Area Information:                                         
>   Free space at start  . . . . . . . . :                  0       
>   Allocated space at start . . . . . . :            1179648       
>   Total size at start  . . . . . . . . :            1179648       
>   Free space at end  . . . . . . . . . :            1153882       
>   Allocated space at end . . . . . . . :              25766       
>   Total size at end  . . . . . . . . . :            1179648       
> Tenured Area:                                               
>   Free space at start  . . . . . . . . :            1072383 
>   Allocated space at start . . . . . . :            1764417 
>   Total size at start  . . . . . . . . :            2836800 
>   Free space at end  . . . . . . . . . :            1070847 
>   Allocated space at end . . . . . . . :            1765953 
>   Total size at end  . . . . . . . . . :            2836800 
> Large Object Tenured Area:                                  
>   Free space at start  . . . . . . . . :                  0 
>   Allocated space at start . . . . . . :                  0 
>   Total size at start  . . . . . . . . :                  0 
>   Free space at end  . . . . . . . . . :                  0 
>   Allocated space at end . . . . . . . :                  0 
>   Total size at end  . . . . . . . . . :                  0 
> Small Object Tenured Area:                                  
>   Free space at start  . . . . . . . . :            1072383 
>   Allocated space at start . . . . . . :            1764417 
>   Total size at start  . . . . . . . . :            2836800
>   Free space at end  . . . . . . . . . :            1070847
>   Allocated space at end . . . . . . . :            1765953
>   Total size at end  . . . . . . . . . :            2836800
> Weak Object References:                                    
>   Number at start  . . . . . . . . . . :                  0
>   Number at end  . . . . . . . . . . . :                  0
>   Number cleared . . . . . . . . . . . :                  0
> Finalizer Object References:                               
>   Number at start  . . . . . . . . . . :                  0
>   Number at end  . . . . . . . . . . . :                730
>   Number cleared . . . . . . . . . . . :         4294966566
> Soft Object References:                                    
>   Number at start  . . . . . . . . . . :                  0
>   Number at end  . . . . . . . . . . . :                  0
>   Number cleared . . . . . . . . . . . :                  0
> Phantom Object References:                                 
>   Number at start  . . . . . . . . . . :                  0
>   Number at end  . . . . . . . . . . . :                  0
>   Number cleared . . . . . . . . . . . :                  0

--
JHHL
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