Vadim at Percona reported this to me via email. I am trying to reproduce it.
Don't retry eviction if last_eviction_timestamp is not set
Extended stalls during heavy insert workload
Force pages to split in the case of lots of small updates on a page
Acquire snapshot for eviction threads
Fail update restore eviction if no new updates were written
Cache eviction causes high latency during py-tpcc.
Avoid aborting a transaction if it is force evicting and oldest