Hi,
I'm a bit puzzled by the results I get
I made test on Fedora 16 with Kernel 3.1.1-1.fc16.x86_64 on LVM2 Logical
Volume of 10G
Firebird 2.5.1 Classic
hdparm /dev/vg_tests/testfb
/dev/vg_tests/testfb:
multcount = 0 (off)
IO_support= 1 (32-bit)
readonly = 0 (off)
readahead
17.11.2011 12:59, Philippe Makowski wrote:
I really wonder if we can't get MaxUnflushedWrites or something like
that under Linux too
I would be curious to do same test with this parameter under Linux
It works for all platforms, you just need to uncomment and set it up in
firebird.conf.
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
On 11/14/11 02:17, Vlad Khorsun wrote:
I thought about to change cache_writer in this direction - make it to do
mini-flush
instead of writting one page at time. But, note, we have no cache_writer
thread in CS\SC
and we can do a little (almost nothing) when page lock is downgraded
