engine: Open lru cache and memtable size of rocskdb

[luanshaotong]

How's the performance about this?

[uran0sH]

How's the performance about this?

@Tricky511 Do you have time to bench it using IO500?

[Tricky511]

How's the performance about this?

@Tricky511 Do you have time to bench it using IO500?

I'll take a test

[Tricky511]

@uran0sH Cannot put an expression as a number

[uran0sH]

@uran0sH Cannot put an expression as a number

fixed!

[Tricky511]

How's the performance about this?

@Tricky511 Do you have time to bench it using IO500?

I measured the difference on a machine is not much

cache: no cache

[uran0sH]

How's the performance about this?

@Tricky511 Do you have time to bench it using IO500?

I measured the difference on a machine is not much

cache: no cache

You can change the cache capacity to the memory's max size.

[Tricky511]

How's the performance about this?

@Tricky511 Do you have time to bench it using IO500?

I measured the difference on a machine is not much cache: no cache

You can change the cache capacity to the memory's max size.

Change to 4GB, no gap no cache