qb linux版不太好用的原因之一是对内存的管理貌似有点呆萌，没有windows版那么灵巧，我在自己vps测试过，加入以下参数后（我的vps是4G内存），确实能够避免卡io情况，据说是qb默认会使用系统虚拟内存，，，，，，
Advanced\osCache=false
Downloads\DiskWriteCacheSize=3072
Downloads\DiskWriteCacheTTL=30
Session\CoalesceReadWrite=false
Session\GuidedReadCache=true
Session\SendBufferLowWatermark=819200
Session\SendBufferWatermark=1228800
Session\SendBufferWatermarkFactor=50
Downloads\DiskWriteCacheSize=3072
Downloads\DiskWriteCacheTTL=30
Session\CoalesceReadWrite=false
Session\GuidedReadCache=true
Session\SendBufferLowWatermark=819200
Session\SendBufferWatermark=1228800
Session\SendBufferWatermarkFactor=50
