Durable memory and Ignite Persistence performance tips

[dmagda]

Igniters,

I’ve created two sections where we can aggregate all the performance tips for the memory and persistence:
https://apacheignite.readme.io/docs/performance-tips#tune-ignite-native-persistence
https://apacheignite.readme.io/docs/performance-tips#section-tune-durable-memory

Please update them once you have relevant suggestions to share with our users.

—
Denis