innodb_flush_log_at_trx_commit - is this important

Hi
what is the optimum value of innodb_flush_log_at_trx_commit to be used ona galera node to get best write performance?

Are there any other variables that need to be modified to get the best performance out of Galera.

I found one reference cnf file but do not know who wrote it and how good is it
https://gist.github.com/3657441

Regards