Andrew, The default vm_dirty_ratio changed from 40 to 10 for the 2.6.22-rc kernels in this patch: http://git.kernel.org/? p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=07db59bd6b0f279c31044cba6787344f63be87ea;hp=de46c33745f5e2ad594c72f2cf5f490861b16ce1
IOZone write drops by about 60% when test file size is 50 percent of memory. Rand-write drops by 90%. Is there a good reason for turning down the default dirty ratio? How will it help for most cases? Intuitively, it seems like a less aggressive writeback will have better performance. Thanks. Tim - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
