MST size is too small. It was created with a very strict footprint limit, since it needed to be created statically and unconditionally.

However, JDK-8256844 reworked NMT initialization and now we can move MST initialization to after argument parsing. Since it is only needed with -XX:NativeMemoryTracking=detail, it makes sense to only conditionally allocate it.

And therefore we can afford to make it larger.

At the moment, it is 511 entries wide. A typical implementation comes to ~3000-6000 entries. Therefore, typically, the median bucket chain length is 7, which is a lot.

Increasing table size to ~4000 drops median bucket chain length to 1.

Example, spring petclinic boot up:

before:
```
Bucket chain length distribution:
unused: 1
longest: 14
median: 7
```

with table size 4099:
```
Bucket chain length distribution:
unused: 1751
longest: 5
median: 1
```