MongoDB 3系からWiredTigerが選べるようになり,メモリ使用量が制限できるようになりました. storage.wiredTiger.engineConfig.cacheSizeGB オプションで指定できます. MongoDB 3.4以降は最低256MB MongoDB 3.4以降,設定下限が256MBに下がりました. Changed in version 3.4: Values can range from 256MB to 10TB and can be a float. (訳: 3.4での変更: 値は256MB~10TBまでのfloat(小数)で指定可能です) Configuration File Options — MongoDB Manual 3.4 #storage.wiredTiger.engineConfig.cacheSizeGB MongoDB 3.2までは
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