Hello,
How to explain that: 2011-08-08T19:02:24.947+0000: 14564.360: [GC 14564.360: [ParNew: 52681K->6528K(59008K), 158.6620830 secs] 2285054K->2240073K(4187776K) icms_dc=0 , 158.6622690 secs] [Times: user=0.00 sys=0.00, real=158.65 secs] Total time for which application threads were stopped: 158.6632510 seconds QUESTION: How can? Zero, Zero, and real=158 seconds?!! However, in most cases (99.99%) I have 2011-08-08T18:55:20.811+0000: 14140.225: [GC 14140.225: [ParNew: 54381K->2110K(59008K), 0.0286450 secs] 1651815K->1599544K(4187776K) icms_dc=0 , 0.0287720 secs] [Times: user=0.00 sys=0.00, real=0.03 secs] Total time for which application threads were stopped: 0.0296330 seconds 2011-08-08T18:55:21.181+0000: 14140.594: [GC 14140.594: [ParNew: 54588K->3056K(59008K), 0.0388800 secs] 1652022K->1600490K(4187776K) icms_dc=0 , 0.0390230 secs] [Times: user=0.00 sys=0.00, real=0.04 secs] Total time for which application threads were stopped: 0.0398510 seconds 2011-08-08T18:55:21.527+0000: 14140.940: [GC 14140.940: [ParNew: 55536K->4812K(59008K), 0.0326740 secs] 1652970K->1602247K(4187776K) icms_dc=0 , 0.0328500 secs] [Times: user=0.00 sys=0.00, real=0.04 secs] Total time for which application threads were stopped: 0.0338200 seconds 2011-08-08T18:55:21.868+0000: 14141.281: [GC 14141.281: [ParNew: 57258K->5232K(59008K), 0.0091650 secs] 1654693K->1604268K(4187776K) icms_dc=0 , 0.0093210 secs] [Times: user=0.00 sys=0.00, real=0.01 secs] Total time for which application threads were stopped: 0.0101470 seconds 2011-08-08T18:55:22.179+0000: 14141.592: [GC 14141.592: [ParNew: 57712K->6521K(59008K), 0.0307120 secs] 1656748K->1608576K(4187776K) icms_dc=0 , 0.0308700 secs] [Times: user=0.00 sys=0.00, real=0.03 secs] Total time for which application threads were stopped: 0.0318530 seconds 2011-08-08T18:55:22.603+0000: 14142.016: [GC 14142.016: [ParNew: 59001K->364K(59008K), 0.0471390 secs] 1661056K->1608313K(4187776K) icms_dc=0 , 0.0472720 secs] [Times: user=0.00 sys=0.00, real=0.05 secs] Total time for which application threads were stopped: 0.0480990 seconds 2011-08-08T18:55:22.994+0000: 14142.407: [GC 14142.407: [ParNew: 52844K->2014K(59008K), 0.0257020 secs] 1660793K->1609963K(4187776K) icms_dc=0 , 0.0258530 secs] [Times: user=0.00 sys=0.00, real=0.03 secs] I believe we are indeed using "virtualization" $0.68/hour, three nodes 7 GB of memory 20 EC2 Compute Units (8 virtual cores with 2.5 EC2 Compute Units each) 1690 GB of instance storage 64-bit platform I/O Performance: High API name: c1.xlarge I am absolutely sure this is unpredictable and cause of a problem is sharing the same hardware with 3-4 other users. Box such as cc1.4xlarge is shared with 3 other users to make 3 instances of c1.xlarge, and no swap file (but "swap caching"?) 23 GB of memory 33.5 EC2 Compute Units (2 x Intel Xeon X5570, quad-core ³Nehalem² architecture) 1690 GB of instance storage 64-bit platform I/O Performance: Very High (10 Gigabit Ethernet) API name: cc1.4xlarge Any EC2 bad/good experience to share? Thanks, -- Fuad Efendi http://www.tokenizer.ca
