Hi, Since a few weeks some of our database servers are running under FreeBSD 7 and we have noticed that writes on HD take a lot of time. To confirm our impression we ran sysbench. The results are the following :
* Under FreeBSD 7 : Random write : Operations performed: 0 Read, 10000 Write, 12800 Other = 22800 Total Read 0b Written 156.25Mb Total transferred 156.25Mb (1.6459Mb/sec) 105.34 Requests/sec executed Test execution summary: total time: 94.9312s total number of events: 10000 total time taken by event execution: 41.1071 per-request statistics: min: 0.0000s avg: 0.0041s max: 0.1653s approx. 95 percentile: 0.0251s * Under FreeBSD 6.2 : random write Operations performed: 0 Read, 10005 Write, 12673 Other = 22678 Total Read 0b Written 156.33Mb Total transferred 156.33Mb (10.505Mb/sec) 672.32 Requests/sec executed Test execution summary: total time: 14.8814s total number of events: 10005 total time taken by event execution: 112.2531 per-request statistics: min: 0.0000s avg: 0.0112s max: 0.9868s approx. 95 percentile: 0.0010s The command used for sysbench is : sysbench --num-threads=16 --test=fileio --file-total-size=3G --file-test-mode=rndwr run I have found absolutely nothing to explain that differences so if someone can help me to solve this problem I would be very grateful. Kind Regards, Julien -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"