no cache option for innodb

[namit jain]

I wanted to add a no cache option to the buffer pool so that a rogue etl process
does not pollute the buffer cache. I am new to mysql/innobase code so would
appreciate any help.

I noticed that there is a BUF_KEEP_OLD flag in buffer cache (buf0buf.c) in
innobase, but could not track how is it being passed from sql, or under which
scenario is it being used ?

I would like to pass it as an optimizer hint, but was confused - which data
structures do I need to change to pass the flag all the way down ? Can someone
tell me the code drill down (data structures to change) ?


Thanks,
-namit