Hi, On Wed, Apr 03, 2002 at 02:23:01PM +0200, Diego SANTA CRUZ wrote: > How is this affected if there are several ext3 filesystems mounted? Can > all journals be resident in memory at a time? > > I have 5 ext3 filesystems, 4 of them with a 32MB journal, and one with a > 1MB journal (small /boot partition). Does this mean that I can have 129 > MB of memory used by the ext3 journals? No more than 1/4 of the journal should be pinned in memory at any one time in the worst case. Also, no more than 5 seconds' worth of journaled fs IO should be pinned. > Since this is a laptop (256 MB) Laptops invariably have slow disks, and 5 seconds of disk write even with data=journal is not going to approach 256MB even closely. In the default journal modes, only a tiny fraction of that is likely to be pinned. Cheers, Stephen
