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From Yang <teddyyyy...@gmail.com>
Subject StorageService.requestGC() ?
Date Thu, 29 Sep 2011 18:14:37 GMT
Table.getDataFileLocation() calls StorageService.requestGC(), which
calls System.gc()

I think I saw one GC in my log due to this code, and it caused a JVM
freeze for 14 seconds.
why do we need to call explicit GC ?

thanks
Yang



[Times: user=2.81 sys=0.00, real=0.46 secs]
3472.943: [GC 3472.943: [ParNew: 21339139K->326984K(23592960K),
0.4742050 secs] 30764101K->10032251K(49807360K), 0.4743710 secs]
[Times: user=2.91 sys=0.01, real=0.47 secs]
3519.043: [GC 3519.043: [ParNew: 21298504K->386099K(23592960K),
0.5201430 secs] 31003771K->10363088K(49807360K), 0.5203120 secs]
[Times: user=3.15 sys=0.03, real=0.52 secs]
3560.277: [GC 3560.278: [ParNew: 21357619K->434850K(23592960K),
0.4693880 secs] 31334608K->10676370K(49807360K), 0.4695450 secs]
[Times: user=2.92 sys=0.00, real=0.47 secs]
3601.343: [Full GC (System) 3601.343: [CMS:
10241519K->3496676K(26214400K), 14.6823750 secs]
28763882K->3496676K(49807360K), [CMS Perm : 27683K->27623K(27776K)],
14.6900120 secs] [Times: user=14.73 sys=0.00, real=14.69 secs]
3665.223: [GC 3665.224: [ParNew: 20971520K->361802K(23592960K),
0.2379040 secs] 24468196K->3858479K(49807360K), 0.2380660 secs]
[Times: user=1.57 sys=0.01, real=0.23 secs]
3704.967: [GC 3704.968: [ParNew: 21333322K->359503K(23592960K),
0.4433910 secs] 24829999K->4173314K(49807360K), 0.4435500 secs]
[Times: user=2.72 sys=0.02, real=0.44 secs]
3801.962: [GC 3801.962: [ParNew: 21331023K->388609K(23592960K),
0.5236180 secs] 25144834K->4479343K(49807360K), 0.5238240 secs]
[Times: user=3.42 sys=0.00, real=0.53 secs]

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