HHVM using way more memory in v3.14

Since the 3.14 version of HHVM, I haven’t been able to run it at all – it would crash on load with a memory error (“Failed to mmap persistent RDS region”). This VPS has been running happily with only 512MB of RAM, but this latest update must’ve pushed it over the line.

I tried a bunch of things to tweak the memory usage but in the end simply couldn’t get it to load; I’ve simply added another 256MB of RAM and now it works fine.

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