Vitaly Zuevsky wrote: > Memory pressure isn't my problem. I see 2-15 major faults a second in the > event loop of the reader thread, which can effectively stall the loop for > anything between 1-400ms (I measure iowait jiffies of the pid). I understand > the faults result from the writer thread, actively modifying the file mmaped > by the reader. I assume writes to the file invalidate corresponding pages of > the reader, and those invalid pages only get updated (via major faults) on > first access by the reader. If not locking, perhaps madvise/willneed > combination could help, what you think? > I think if this is your concern you should just use WRITEMAP and forget about it.
-- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/
