以下是我们在Java 1.6上运行的JBoss EAP 5.1 GC日志的摘录：
DPIScalingX = Me.CreateGraphics().DpiX / 96
DPIScalingY = Me.CreateGraphics().DpiY / 96
我不确定的部分是CMS并发扫描。对于我所知道的所有CMS并发扫描，与ParNew不同，它不是一个“停止世界”的集合。但是，我们在我们的应用程序中观察到一些严重的冻结，我们正试图解释并怀疑是由GC引起的。可能是“并发模式失败”意味着并发GC失败并且应用程序确实冻结了“实时”列中列出的时间，即9.21s？
364655.706: [GC 364655.706: [ParNew: 186319K->22912K(206464K), 0.0456839 secs] 1774216K->1611127K(1812096K) icms_dc=4 , 0.0462598 secs] [Times: user=0.81 sys=0.01, real=0.05 secs]
364656.441: [GC 364656.441: [ParNew (promotion failed): 206451K->189950K(206464K), 0.1100582 secs] 1791535K->1780699K(1812096K) icms_dc=12 , 0.1104138 secs] [Times: user=0.27 sys=0.02, real=0.11 secs]
364656.551: [Full GC 364656.552: [CMS364657.837: [CMS-concurrent-sweep: 1.493/97.968 secs] [Times: user=300.13 sys=1.86, real=97.97 secs]
(concurrent mode failure): 1590748K->1090269K(1605632K), 9.2142390 secs] 1780699K->1090269K(1812096K), [CMS Perm : 61890K->61714K(103144K)] icms_dc=12 , 9.2145846 secs] [Times: user=9.21 sys=0.00, real=9.21 secs]
364666.357: [GC [1 CMS-initial-mark: 1090269K(1605632K)] 1171162K(1812096K), 0.1117573 secs] [Times: user=0.11 sys=0.00, real=0.11 secs]
364666.469: [CMS-concurrent-mark-start]
364667.417: [GC 364667.417: [ParNew: 183552K->7298K(206464K), 0.0584138 secs] 1273821K->1097567K(1812096K) icms_dc=12 , 0.0588452 secs] [Times: user=1.11 sys=0.01, real=0.06 secs]
364668.334: [CMS-concurrent-mark: 0.501/1.865 secs] [Times: user=17.46 sys=0.82, real=1.87 secs]
364668.334: [CMS-concurrent-preclean-start]
364669.335: [GC 364669.335: [ParNew: 190850K->5444K(206464K), 0.0148770 secs] 1281119K->1095714K(1812096K) icms_dc=12 , 0.0152002 secs] [Times: user=0.35 sys=0.01, real=0.02 secs]
364671.159: [GC 364671.159: [ParNew: 188996K->5501K(206464K), 0.0111976 secs] 1279266K->1095770K(1812096K) icms_dc=12 , 0.0115905 secs] [Times: user=0.25 sys=0.00, real=0.01 secs]
364673.061: [GC 364673.061: [ParNew: 189053K->5359K(206464K), 0.0124856 secs] 1279322K->1095628K(1812096K) icms_dc=12 , 0.0129190 secs] [Times: user=0.30 sys=0.00, real=0.01 secs]
364675.100: [GC 364675.100: [ParNew: 188911K->1862K(206464K), 0.0225664 secs] 1279180K->1096083K(1812096K) icms_dc=12 , 0.0228625 secs] [Times: user=0.31 sys=0.01, real=0.02 secs]
364677.150: [GC 364677.150: [ParNew: 185414K->1230K(206464K), 0.0195299 secs] 1279635K->1095569K(1812096K) icms_dc=12 , 0.0199073 secs] [Times: user=0.25 sys=0.00, real=0.02 secs]
364679.107: [CMS-concurrent-preclean: 2.004/10.773 secs] [Times: user=45.16 sys=0.72, real=10.77 secs]
364679.107: [CMS-concurrent-abortable-preclean-start]
CMS: abort preclean due to time 364684.161: [CMS-concurrent-abortable-preclean: 0.642/5.054 secs] [Times: user=20.65 sys=0.13, real=5.05 secs]
364684.163: [GC[YG occupancy: 87260 K (206464 K)]364684.163: [Rescan (parallel) , 0.0298602 secs]364684.193: [weak refs processing, 0.4917946 secs] [1 CMS-remark: 1094338K(1605632K)] 1181599K(1812096K), 0.6149585 secs] [Times: user=1.26 sys=0.01, real=0.62 secs]
364684.779: [CMS-concurrent-sweep-start]
364686.357: [CMS-concurrent-sweep: 1.576/1.578 secs] [Times: user=9.17 sys=0.05, real=1.58 secs]
364686.358: [CMS-concurrent-reset-start]