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Bad performance in comparison with myisam
Posted by: fasdf asdfasd
Date: January 14, 2013 10:17AM


I have this setup

- baremetal Xeon quadcore 48gb RAM , 1gbps interconnect with Ethernet
- ndbd - 12GB memory usage (8GB data + 3GB index + 1GB operations)
- 1x 1TB HDD 7200rpm

1x virtual machine on RAID6 storage
- ndb_mgmd
- mysqld

Results of my testing are horrible, and I cannot find any bottleneck. There are numbers:

Executed on ndb_mgmd machine (testing ndb):
perl test-insert --server=mysql --create-options=ENGINE=ndbcluster --server=mysql
Total time: 341 wallclock secs (11.26 usr 0.63 sys + 0.00 cusr 0.00 csys = 11.89 CPU)

Executed on ndb_mgmd machine (testing myisam):
perl test-insert --server=mysql --create-options=ENGINE=MyISAM --server=mysql
Total time: 25 wallclock secs (10.40 usr 0.84 sys + 0.00 cusr 0.00 csys = 11.24 CPU)

I know there is synchronous writing in ndb, but come on, it cannot be 15x times slower than MyISAM.

Could you please explain, what should I examine in this setup? Thanks.

Ladislav Prokopny

Edited 2 time(s). Last edit at 01/14/2013 10:39AM by fasdf asdfasd.

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Bad performance in comparison with myisam
January 14, 2013 10:17AM

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