Cassandra Summit Recap: Diagnosing Problems in Production
Great runbook for C* ops
get page cache statistics for files.
A common question when tuning databases and other IO-intensive applications is, “is Linux caching my data or not?” pcstat gets that information for you using the mincore(2) syscall. I wrote this is so that Apache Cassandra users can see if ssTables are being cached.
(tags: linux page-cache caching go performance cassandra ops mincore fincore)