To rephrase what Avinash said:
- Roughly 10% of your tasks dropped off the run queue since they hit a "cache miss".
- Overall you cache hit statistics is pretty good. You will not be able to solve the 10% context switch due to cache miss by simply making the cache bigger. You will have to dig in to see which objects are missing from the cache and if you can identify the objects that are constantly missing you may find a way to amend this (say by using a named cache)
HTH.