Something like this? Using SHOW VARIABLES and SHOW GLOBAL STATUS:
Expression: innodb_buffer_pool_size / _ram
Meaning: % of RAM used for InnoDB buffer_pool
Recommended range: 60~80%
Expression: Innodb_buffer_pool_reads / Innodb_buffer_pool_read_requests
Meaning: Read requests that had to hit disk
Recommended range: 0-2%
What to do if out of range: Increase innodb_buffer_pool_size if you have enough RAM.
Expression: Innodb_pages_read / Innodb_buffer_pool_read_requests
Meaning: Read requests that had to hit disk
Recommended range: 0-2%
What to do if out of range: Increase innodb_buffer_pool_size if you have enough RAM.
Expression: Innodb_pages_written / Innodb_buffer_pool_write_requests
Meaning: Write requests that had to hit disk
Recommended range: 0-15%
What to do if out of range: Check innodb_buffer_pool_size
Expression: Innodb_buffer_pool_reads / Uptime
Meaning: Reads
Recommended range: 0-100/sec.
What to do if out of range: Increase innodb_buffer_pool_size?
Expression: (Innodb_buffer_pool_reads + Innodb_buffer_pool_pages_flushed) / Uptime
Meaning: InnoDB I/O
Recommended range: 0-100/sec.
What to do if out of range: Increase innodb_buffer_pool_size?
Expression: Innodb_buffer_pool_pages_flushed / Uptime
Meaning: Writes (flushes)
Recommended range: 0-100/sec.
What to do if out of range: Increase innodb_buffer_pool_size?
Expression: Innodb_buffer_pool_wait_free / Uptime
Meaning: Counter for when there are no free pages in buffer_pool. That is, all pages are dirty.
Recommended range: 0-1/sec.
What to do if out of range: First be sure innodb_buffer_pool_size is set reasonably; if still trouble, decrease innodb_max_dirty_pages_pct