After about 49 days of uptime, the system process of my ESXi 6.7 U1 host (free version) is consuming a lot of CPU time:
ID GID NAME NWLD %USED %RUN %SYS %WAIT %VMWAIT %RDY %IDLE %
1 1 system 190 39.67 784.10 0.01 17919.68 - 45.31 0.00
By expanding GID 1 in esxtop, I find that a process called "OCFlush" is responsible for the high load.
Searching the web for OCFlush yields a post on reddit where people suppose this might be some kind of overflow, since 2^32 ms ≈ 49 days and 17 hours.
Is that a known bug? What is the purpose of OCFlush?