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[www@server1 tmp]$ ruby test_gc.rb
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ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-linux]
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2018-12-11 03:14:13 +0000
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Memory: Process RSS/System Total Memory/System Free Memory
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0m0s 21820 Memory:9.61 MB/3.85 GB/3.28 GB, objspace_mem:4.07 MB
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0m3s 21820 Memory:9.61 MB/3.85 GB/3.28 GB, objspace_mem:3.39 MB
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0m6s 21820 Memory:9.61 MB/3.85 GB/3.28 GB, objspace_mem:3.39 MB
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0m9s 21820 Memory:9.61 MB/3.85 GB/3.28 GB, objspace_mem:3.39 MB
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read content from file 214189538[204.27 MB]
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0m12s 21820 Memory:213.95 MB/3.85 GB/3.08 GB, objspace_mem:207.65 MB
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0m15s 21820 Memory:213.95 MB/3.85 GB/3.08 GB, objspace_mem:207.65 MB
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0m18s 21820 Memory:213.95 MB/3.85 GB/3.08 GB, objspace_mem:207.65 MB
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0m21s 21820 Memory:213.95 MB/3.85 GB/3.08 GB, objspace_mem:207.65 MB
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0m24s 21820 Memory:213.95 MB/3.85 GB/3.09 GB, objspace_mem:207.65 MB
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0m27s 21820 Memory:213.95 MB/3.85 GB/3.09 GB, objspace_mem:207.65 MB
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0m31s 21820 Memory:213.95 MB/3.85 GB/3.09 GB, objspace_mem:207.65 MB
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0m34s 21820 Memory:213.95 MB/3.85 GB/3.09 GB, objspace_mem:207.65 MB
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0m37s 21820 Memory:213.95 MB/3.85 GB/3.09 GB, objspace_mem:207.65 MB
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0m40s 21820 Memory:213.95 MB/3.85 GB/3.09 GB, objspace_mem:207.65 MB
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parse json string to object
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0m58s 21820 Memory:1.36 GB/3.85 GB/1.72 GB, objspace_mem:1.23 GB
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1m3s 21820 Memory:1.36 GB/3.85 GB/1.72 GB, objspace_mem:1.23 GB
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1m7s 21820 Memory:1.36 GB/3.85 GB/1.71 GB, objspace_mem:1.23 GB
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1m12s 21820 Memory:1.36 GB/3.85 GB/1.71 GB, objspace_mem:1.23 GB
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1m17s 21820 Memory:1.36 GB/3.85 GB/1.71 GB, objspace_mem:1.23 GB
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1m21s 21820 Memory:1.36 GB/3.85 GB/1.71 GB, objspace_mem:1.23 GB
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1m26s 21820 Memory:1.36 GB/3.85 GB/1.35 GB, objspace_mem:1.23 GB
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set string&object to nil, and sleep 30 min to check the memory usage.
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1m30s 21820 Memory:1.14 GB/3.85 GB/1.42 GB, objspace_mem:3.39 MB
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1m33s 21820 Memory:1.14 GB/3.85 GB/1.26 GB, objspace_mem:3.39 MB
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1m36s 21820 Memory:1.14 GB/3.85 GB/864.88 MB, objspace_mem:3.39 MB
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1m39s 21820 Memory:1.14 GB/3.85 GB/703.86 MB, objspace_mem:3.39 MB
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1m42s 21820 Memory:1.14 GB/3.85 GB/577.93 MB, objspace_mem:3.39 MB
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1m45s 21820 Memory:1.04 GB/3.85 GB/683.15 MB, objspace_mem:3.39 MB
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1m48s 21820 Memory:965.34 MB/3.85 GB/784.3 MB, objspace_mem:3.39 MB
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1m51s 21820 Memory:965.34 MB/3.85 GB/784.52 MB, objspace_mem:3.39 MB
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1m54s 21820 Memory:965.34 MB/3.85 GB/784.11 MB, objspace_mem:3.39 MB
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1m58s 21820 Memory:965.34 MB/3.85 GB/784.35 MB, objspace_mem:3.39 MB
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2m1s 21820 Memory:965.34 MB/3.85 GB/784.38 MB, objspace_mem:3.39 MB
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2m4s 21820 Memory:965.34 MB/3.85 GB/784.39 MB, objspace_mem:3.39 MB
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2m7s 21820 Memory:965.34 MB/3.85 GB/653.25 MB, objspace_mem:3.39 MB
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2m10s 21820 Memory:965.34 MB/3.85 GB/428.16 MB, objspace_mem:3.39 MB
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2m13s 21820 Memory:965.34 MB/3.85 GB/165.63 MB, objspace_mem:3.39 MB
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2m16s 21820 Memory:965.34 MB/3.85 GB/139.71 MB, objspace_mem:3.39 MB
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2m19s 21820 Memory:965.34 MB/3.85 GB/47.18 MB, objspace_mem:3.39 MB
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2m22s 21820 Memory:964.97 MB/3.85 GB/36.18 MB, objspace_mem:3.39 MB
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2m25s 21820 Memory:964.97 MB/3.85 GB/35.93 MB, objspace_mem:3.39 MB
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2m28s 21820 Memory:964.97 MB/3.85 GB/38.13 MB, objspace_mem:3.39 MB
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2m31s 21820 Memory:964.97 MB/3.85 GB/144.21 MB, objspace_mem:3.39 MB
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2m34s 21820 Memory:964.97 MB/3.85 GB/245.2 MB, objspace_mem:3.39 MB
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2m37s 21820 Memory:964.86 MB/3.85 GB/36.17 MB, objspace_mem:3.39 MB
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2m40s 21820 Memory:964.86 MB/3.85 GB/35.6 MB, objspace_mem:3.39 MB
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2m43s 21820 Memory:964.86 MB/3.85 GB/35.53 MB, objspace_mem:3.39 MB
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2m46s 21820 Memory:964.86 MB/3.85 GB/35.43 MB, objspace_mem:3.39 MB
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2m49s 21820 Memory:964.86 MB/3.85 GB/35.43 MB, objspace_mem:3.39 MB
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2m52s 21820 Memory:962.87 MB/3.85 GB/39.5 MB, objspace_mem:3.39 MB
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2m55s 21820 Memory:871.83 MB/3.85 GB/372.46 MB, objspace_mem:3.39 MB
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2m58s 21820 Memory:871.83 MB/3.85 GB/368.49 MB, objspace_mem:3.39 MB
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3m1s 21820 Memory:871.83 MB/3.85 GB/368.03 MB, objspace_mem:3.39 MB
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3m4s 21820 Memory:871.83 MB/3.85 GB/364.91 MB, objspace_mem:3.39 MB
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3m7s 21820 Memory:871.83 MB/3.85 GB/297.21 MB, objspace_mem:3.39 MB
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3m10s 21820 Memory:871.83 MB/3.85 GB/38.65 MB, objspace_mem:3.39 MB
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3m13s 21820 Memory:847.86 MB/3.85 GB/36.22 MB, objspace_mem:3.39 MB
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Killed
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[www@server1 tmp]$
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