Plugins like this provide extra functionality beyond Pingdom Server Monitor's default monitoring capabilities. This and 90+ other plugins are available via a one-click install in our web interface.
InnoDB Stats

This plugin tracks the size of the buffer pool, usage and the read/write ratio.
Overview
This plugin tracks the size of the buffer pool, usage and the read/write ratio. It returns:
- buffer_pool_size: The currently configured buffer pool size.
- buffer_pool_capacity: The percentage of the configured buffer pool that’s used.
- buffer_pool_pages_free: Number of free pages.
- page_size: The configured page size.
- write_percentage: The percentage of total queries that write data.