Hi,
yesterday I installed Solaris 01/08 on a Sun's server with two 2Ghz Opterons
and 2 GB ram
(I don't remember the model of the server but it's one of those 1U
rack-mountable
servers with -hideous- rocket-loud fans that never slow down, maybe VX2200 ? )
I configured the bundled Mysql 5.0.xx to work on a ZFS pool made on a raid1 on
the
2 bundled disks, but although I followed all the tuning tips found in various
Sun bloggers,
that can be resumed as:
- limiting zfs's usage of memory to 256MB (appending to /etc/system
set zfs:zfs_arc_max = 0x8000000
and rebooting, hopefully I did the right thing)
- increasing up to 1.5GB the parameter innodb_buffer_pool_size
and up to 48M innodb_additional_mem_pool_size (in steps, of course)
- trying innodb_flush_method = O_DIRECT
- zfs's recordsize=16k on that particular pool, set before creating a single
file on it
the performance is simply despairing. Just to give you and idea: an import from
a 7 MB
SQL dumpe takes 9 seconds if I set engine=myisam, and 98 seconds if
engine=innodb.
Considering that both myisam and innodb tables are stored on the same zfs pool
and on the same directory I daresay that there's something extremely wrong in
the
interaction of my innodb with zfs.
I hope that someone can help me.
Thanks,
Nico
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