求生之路2 heapsize启动项设置
灵感来源于https://www.bilibili.com/read/cv22642688。
这里是V社给出的heapsize的注释：Specifies the heapsize (in kilobyte) the game will use. This no longer exists on later version of Source 2009 and Source Multiplayer. 大概意思是指定游戏使用的堆大小（单位kb）
刚刚测试了下，在游戏里用mem_dump看内存分配情况。
heapsize在524288(1024 * 512) - 2097151(1024 * 1024 * 2 - 1)之间指令都能正常工作，
超过524288后除WaveData（似乎是音频文件？）外其余几项（模型文件等）都达到最大值，
在2097151下WaveData达到最大值(512.00 MB)。
heapsize达到2097152时游戏似乎无法正确调用内存，开战役也会直接闪退。
按照cv22642688里的方法设置（6000000，9000000，18000000等都试过），这几个超过2097151的值都被截断了，和更低的值没有区别。
这样看来2097151是配置允许的情况下，能设置的极限了。
不知道524288和2097151在实际游戏中有什么区别 XD
总结
设置为524288即可
heapsize上限为2097151，实际上设置524288分配给模型文件等的内存已经达到最大值，再往上加也只有增加音频文件的缓存。当然配置允许可以直接拉满。
以下是各个参数的情况
524288:
] mem_dump
Writing memory stats to file memstats.txt
Operating system reports Available: 4064.00 MB, Used: -32.00 MB, Free: 4096.00 MB
Internal heap reports: 0.08 MB (81364 bytes)
Hunk Memory Used :
Total used memory: 16
Total committed memory: 33554432
Datacache reports:
Section [ModelData]: 0 resources total 0 bytes, 0.00 % of limit (512 MB)
Section [ModelMesh]: 0 resources total 0 bytes, 0.00 % of limit (512 MB)
Section [AnimBlock]: 0 resources total 0 bytes, 0.00 % of limit (512 MB)
Section [ColorMesh]: 0 resources total 0 bytes, 0.00 % of limit (512 MB)
Section [Captions]: 0 resources total 0 bytes, 0.00 % of limit (64 KB)
Section [WaveData]: 1 resources total 1.40 MB, 1.09 % of limit (128 MB)
Summary: 1 resources total 1.40 MB, 0.27 % of capacity
2097151:
] mem_dump
Writing memory stats to file memstats.txt
Operating system reports Available: 4064.00 MB, Used: -32.00 MB, Free: 4096.00 MB
Internal heap reports: 0.08 MB (82431 bytes)
Hunk Memory Used :
Total used memory: 16
Total committed memory: 33554432
Datacache reports:
Section [ModelData]: 0 resources total 0 bytes, 0.00 % of limit (512 MB)
Section [ModelMesh]: 0 resources total 0 bytes, 0.00 % of limit (512 MB)
Section [AnimBlock]: 0 resources total 0 bytes, 0.00 % of limit (512 MB)
Section [ColorMesh]: 0 resources total 0 bytes, 0.00 % of limit (512 MB)
Section [Captions]: 0 resources total 0 bytes, 0.00 % of limit (64 KB)
Section [WaveData]: 1 resources total 1.48 MB, 0.29 % of limit (512.00 MB)
Summary: 1 resources total 1.48 MB, 0.29 % of capacity
2097152:
] mem_dump
Writing memory stats to file memstats.txt
Operating system reports Available: 4064.00 MB, Used: -32.00 MB, Free: 4096.00 MB
Internal heap reports: 0.08 MB (81367 bytes)
Hunk Memory Used :
Total used memory: 16
Total committed memory: 33554432
Datacache reports:
Section [ModelData]: 0 resources total 0 bytes, 0.00 % of limit (1,024 KB)
Section [ModelMesh]: 0 resources total 0 bytes, 0.00 % of limit (1,024 KB)
Section [AnimBlock]: 0 resources total 0 bytes, 0.00 % of limit (1,024 KB)
Section [ColorMesh]: 0 resources total 0 bytes, 0.00 % of limit (1,024 KB)
Section [Captions]: 0 resources total 0 bytes, 0.00 % of limit (64 KB)
Section [WaveData]: 1 resources total 1.53 MB, 0.30 % of limit (512 MB)
Summary: 1 resources total 1.53 MB, 153.28 % of capacity
