The file system and page flushing parameters in Table A-5 provide for tuning file system performance and manage the flushing of dirty pages from memory to disk.
You can read more about the fsflush and associated parameters in “Bypassing the Page Cache with Direct I/O” . “Directory Name Cache” and “Inode Caches” have more information on the file system parameters directory and inode caches.
|tune_t_flushr||5||Tunable||fsflush interval; the fsflush daemon runs every tune_t_flushr seconds.|
|autoup||30||Tunable||Age in seconds of dirty pages. Used in conjunction with tune_t_fsflushr; modified pages that are older than autoup are written ...|