I've tried looking into some boxes in other farms like 119.46.111.10 and 119.46.111.14 and noticed one difference between these boxes. Other than the differences in SC versions and physical specifications, the Kernel sysctl configuration file (/etc/sysctl.conf) has different values on SC022 - SC025. Even though I do not have any evidence on the root cause, but I would strongly recommend they should be in sync. May I suggest to have this change take place asap on SC022 - SC025?