On 14-11-2011 05:31, Vlad Khorsun wrote: > > My doubt is that we will write more pages than necessary. Imagine small > cache (CS) > and set of actively modifying pages. Currently we will write them one-by-one > when new > buffer is required. You offer to write, say, 2 pages at time and replace one > of them. > Second written page could be modified again and we will write it again, so > first write > was not needed. >
But, remember, current cost (maybe of ext4 only) of writing one page at a time with O_DSYNC should be high than write these extra pages at once (without O_DSYNC) and do a flush. Adriano ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
