Question : I’m running DB2 9.5 . How do I check the FILESYSTEM CACHING status on a DB2 tablespace?
Answer: DB2 bufferpools and Linux filecache perform approximately the same function.
Thefunction is : copy data from disk.
DirectIO directs reads from disk into DB2 memory.DirectIO is set up on a tablespace by tablespace basis. The tablespace option is NO FILE SYSTEM CACHING
Can be applied to: system tablespaces, temporary tablespaces
Note: LOB and LONG VARCHAR doesn’t benefit – and continues to use file cache
Check FILESYSTEM caching by db2 -v "get snapshot for tablespaces on myDB" | more
Check for File system caching