Set dedicated block cache for blob transactions

[asdacap]

• Seems to be that the block cache size fluctuate.
• Seems to map with the blob transactions index.
• This set a dedicated block cache for blob transactions so that it does not effect the shared block cache which is used by state.
• The effect of the shared block cache on the block processing is was shown to be not much at all before as the file get os-cached in the first place. There could be a minor difference though.

Changes

• Set dedicated block cache for blob transaction.

Types of changes

What types of changes does your code introduce?

• Optimization

Testing

Requires testing

• Yes
• No

If yes, did you write tests?

• Yes
• No

Notes on testing

• Manual log shows dedicated cache is used.