Paul Jakma said:
> On Wed, 11 Apr 2001, John P. Looney wrote:
>> > However, if you are storing the database on a ramdisk - is there any point
> > using mmap() ? Mapping memory to memory seems messed up to me :)
>> presumably there would be as you avoid the VFS.
But then you have to hope the OS doesn't have any wierd ramdisk bugs,
which may not be the case for odd mmap()-type cases esp. with 2.4.x,
AFAICS from reading Kernel Traffic...
I would say that you should do some amateur benchmarking to measure it.
The mmap() case is most likely optimised for real disks, not ramdisks, and
ramdisks ('cos they chew up real RAM) can have bad effects on caching.
BTW those Ratpoison people scare me, with their "rat" hatred. eek.
--j.
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