On Thu, 31 May 2012, Victor Sudakov wrote:
Colleagues,
I have installed 9.0-RELEASE on a SSD drive with the following
tweaking so far:
1. tmpmfs="YES" (WRKDIRPREFIX etc will go there too).
2. mount -o noatime
3. tunefs -t enable
I have not done any tricky partition alignment, do I really need to? Is
anything else advisable?
If it's not aligned, there can be a pretty significant performance
drop. Please show the output of 'gpart show' on that drive if it's GPT
(gpart show ada0) or drive and slice if it's MBR/bsdlabel (gpart show
ada0 && gpart show ada0s1).
There is one thing that worries me, why is TRIM not shown as enabled in
camcontrol output?
[root@vas ~] tunefs -p /dev/ada0p2 | & grep -i trim
tunefs: trim: (-t) enabled
[root@vas ~] camcontrol identify ada0 | egrep '^Fea|TRIM'
Feature Support Enabled Value Vendor
data set management (TRIM) yes
[root@vas ~]
I think that no value there means it cannot be enabled or disabled; it's
always on.
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