47G total heap
15G old
32G young
survival ratio 2: 16G + 8G + 8G
time in young gc: 59.84secs + 2 cms

java -Xms47g -Xmx47g 
-verbose:gc 
-XX:+PrintGCDetails 
-XX:+PrintGCTimeStamps 
-Xloggc:gc.txt 
-XX:+PrintTenuringDistribution 
-XX:+UseConcMarkSweepGC 
-Xmn32g 
-XX:SurvivorRatio=2 
-XX:MaxTenuringThreshold=2 
-XX:MaxPermSize=100m 
-XX:+DoEscapeAnalysis


97.208: [Full GC 97.209: [CMS: 0K->607685K(15728640K), 3.3357690 secs] 10113574K->607685K(40894464K), [CMS Perm : 21247K->21202K(21248K)], 3.3360760 secs] [Times: user=2.59 sys=0.74, real=3.33 secs] 
183.894: [Full GC 183.895: [CMS: 607685K->1303984K(15728640K), 6.4053610 secs] 11103438K->1303984K(40894464K), [CMS Perm : 35268K->35226K(35340K)], 6.4056530 secs] [Times: user=5.82 sys=0.49, real=6.40 secs] 
425.408: [GC 425.408: [ParNew
Desired survivor size 4294967296 bytes, new threshold 2 (max 2)
- age   1: 1002749880 bytes, 1002749880 total
: 16777216K->983238K(25165824K), 1.0219690 secs] 18081200K->2287223K(40894464K), 1.0220650 secs] [Times: user=4.54 sys=2.40, real=1.02 secs] 
455.216: [GC 455.216: [ParNew
Desired survivor size 4294967296 bytes, new threshold 2 (max 2)
- age   1: 1666680944 bytes, 1666680944 total
- age   2: 1002137736 bytes, 2668818680 total
: 17760454K->2781696K(25165824K), 1.7913690 secs] 19064439K->4085681K(40894464K), 1.7914870 secs] [Times: user=9.52 sys=4.73, real=1.79 secs] 
465.888: [GC 465.888: [ParNew
Desired survivor size 4294967296 bytes, new threshold 2 (max 2)
- age   1: 1742858224 bytes, 1742858224 total
- age   2: 1310339768 bytes, 3053197992 total
: 19558912K->3963094K(25165824K), 6.4111010 secs] 20862897K->6350899K(40894464K), 6.4112320 secs] [Times: user=19.17 sys=9.11, real=6.41 secs] 
482.873: [GC 482.873: [ParNew
Desired survivor size 4294967296 bytes, new threshold 2 (max 2)
- age   1: 1891697432 bytes, 1891697432 total
- age   2: 1315666456 bytes, 3207363888 total
: 20740310K->4838104K(25165824K), 7.7276260 secs] 23128115K->8583110K(40894464K), 7.7277620 secs] [Times: user=14.99 sys=2.64, real=7.73 secs] 
501.181: [GC 501.181: [ParNew
Desired survivor size 4294967296 bytes, new threshold 2 (max 2)
- age   1: 1638683288 bytes, 1638683288 total
- age   2: 1758593032 bytes, 3397276320 total
: 21615320K->5320481K(25165824K), 12.4705790 secs] 25360326K->10386914K(40894464K), 12.4707260 secs] [Times: user=39.77 sys=18.36, real=12.47 secs] 
642.400: [GC 642.400: [ParNew
Desired survivor size 4294967296 bytes, new threshold 2 (max 2)
- age   1: 1249492944 bytes, 1249492944 total
- age   2: 1633168184 bytes, 2882661128 total
: 22097697K->5278513K(25165824K), 13.4776180 secs] 27164130K->12090344K(40894464K), 13.4778750 secs] [Times: user=34.17 sys=16.80, real=13.48 secs] 
708.951: [GC 708.951: [ParNew
Desired survivor size 4294967296 bytes, new threshold 2 (max 2)
- age   1: 2172154352 bytes, 2172154352 total
- age   2:  887769232 bytes, 3059923584 total
: 22044144K->3735460K(25165824K), 9.8892390 secs] 28855975K->12147234K(40894464K), 9.8894340 secs] [Times: user=17.50 sys=6.42, real=9.88 secs] 
718.847: [GC [1 CMS-initial-mark: 8411774K(15728640K)] 12244532K(40894464K), 1.7276030 secs] [Times: user=1.72 sys=0.00, real=1.73 secs] 
720.575: [CMS-concurrent-mark-start]
732.441: [CMS-concurrent-mark: 11.748/11.867 secs] [Times: user=23.51 sys=0.49, real=11.86 secs] 
732.442: [CMS-concurrent-preclean-start]
732.483: [CMS-concurrent-preclean: 0.041/0.041 secs] [Times: user=0.05 sys=0.02, real=0.04 secs] 
732.483: [CMS-concurrent-abortable-preclean-start]
 CMS: abort preclean due to time 737.955: [CMS-concurrent-abortable-preclean: 5.358/5.472 secs] [Times: user=5.47 sys=0.14, real=5.48 secs] 
737.959: [GC[YG occupancy: 5987953 K (25165824 K)]737.960: [Rescan (parallel) , 1.0440140 secs]739.004: [weak refs processing, 0.0002500 secs] [1 CMS-remark: 8411774K(15728640K)] 14399727K(40894464K), 1.0444270 secs] [Times: user=3.83 sys=0.02, real=1.05 secs] 
739.012: [CMS-concurrent-sweep-start]
745.191: [CMS-concurrent-sweep: 6.159/6.179 secs] [Times: user=6.55 sys=0.12, real=6.17 secs] 
745.191: [CMS-concurrent-reset-start]
745.273: [CMS-concurrent-reset: 0.081/0.081 secs] [Times: user=0.08 sys=0.00, real=0.08 secs] 
839.332: [GC 839.332: [ParNew
Desired survivor size 4294967296 bytes, new threshold 2 (max 2)
- age   1:  747556792 bytes,  747556792 total
- age   2: 1882219112 bytes, 2629775904 total
: 20512676K->4400865K(25165824K), 1.8752070 secs] 27363922K->12061558K(40894464K), 1.8753480 secs] [Times: user=9.16 sys=0.27, real=1.87 secs] 
933.877: [GC 933.877: [ParNew
Desired survivor size 4294967296 bytes, new threshold 2 (max 2)
- age   1:  100167856 bytes,  100167856 total
- age   2:  727947720 bytes,  828115576 total
: 21178081K->2050279K(25165824K), 5.1698630 secs] 28838774K->11549065K(40894464K), 5.1700110 secs]