Another streaming replication question

Good morning,

Thank you all for your responses to my questions about streaming/cascading
replication. I have them ironed out and running on three postgres 9.4
sandbox servers.
My question is not 'how to ' but more 'best practices'. We currently have
hot standby non-streaming replication with one master serving two standbys
in parallel. We wish to convert
to streaming replication. My concern is that the logshipping load can be
quite high - up to 40 16MB logs per minute (during off-hours maintenance).
In our current hot standby
environment the logs can queue up on the master side during this period -
eventually, during times of lower load they do catch up. So, a couple
questions:
1. Can streaming replication work in this high-load situation?
2. What, if anything, can I do to make it work better? Perhaps convert
to cascade? Master -->standby1 ---> standby2

I have attached the postgres.conf file for our master for reference.

Any insights welcome. Thank you.

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*Mark Steben*
Database Administrator
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