TCMalloc 是用于优化C++写的多线程应用，比glibc 2.3的malloc快。详细说明请看TCMalloc：线程缓存的Malloc。这里我只测试它对mysql的影响到底有多少；从测试结果来看，数据量较小时，采用TCMalloc还是值得的，但是数据量较大之后，貌似反而更差了。本次测试采用sysbench工具，实际表现还是放到真正运行环境中才能知晓了。
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表记录数
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prepare
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transaction/s
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r/w request/s
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other/s
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total time
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|
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100w
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17.524
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2071.5
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39358.47
|
4143
|
4.8274
|
malloc
|
|
16.015
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2182.41
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41465.73
|
4364.81
|
4.5821
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tcmalloc
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|
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||||||
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500w
|
1m30.819
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1865.3
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35440.75
|
3730.61
|
5.3611
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|
|
1m23.496
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1915.09
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36386.74
|
3830.18
|
5.2217
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||
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1000w
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3m7.059
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1239.32
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23547.15
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2478.65
|
8.0689
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|
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2m54.832
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1881.11
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35741.08
|
3762.22
|
5.316
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||
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5000w
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15m57.269
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403.65
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7669.44
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807.31
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123.8683
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|
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15m17.735
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392.3
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7453.66
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784.6
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127.4541
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||
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1亿
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|
468.56
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8902.7
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937.13
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106.7092
|
|
|
|
452.12
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8590.31
|
904.24
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110.5897
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