Date: Sat, 2 Oct 2010 15:48:10 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Rumen Telbizov" <telbizov@gmail.com>, <freebsd-stable@freebsd.org> Subject: Re: MySQL performance concern Message-ID: <ACD11509724249559BD89DDD26F67C62@multiplay.co.uk> References: <AANLkTikGHByF0dJ-hj6zPoRhV6YoHGSrW3g0audama3M@mail.gmail.com>
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When you say similar hardware whets the actual spec? What do you have set in my.cnf? What config options are you using for zfs? ----- Original Message ----- From: "Rumen Telbizov" <telbizov@gmail.com> To: <freebsd-stable@freebsd.org> Sent: Saturday, October 02, 2010 8:06 AM Subject: MySQL performance concern > Hello everyone, > > I am experimenting with MySQL running on FreeBSD and comparing with another > (older) setup running on a Linux box. > My results show that performance on Linux is significantly better than > FreeBSD although the hardware is weaker. > I'd appreciate your comments and ideas. > > Here's the setup: > > 1) FreeBSD 8.1-STABLE amd64 (Tue Sep 14 15:29:22 PDT 2010) running on a > SuperMicro machine with 2 x Dual Core > Xeon E5502 1.87Ghz ; 4 x SAS 15K in RAID10 setup under ZFS (two mirrored > pairs) and 2 x SSD X25-E partitioned > for: 8G for ZIL and the rest for L2ARC; 16G ram with 8 of them given to > mysql and tons of free. > > 2) Linux Gentoo with 3 SATA disks in hardware RAID5 with similar > cpu/motherboard and same memory size. > > The sole application that runs is a python script which inserts a batch of > lines at a time. Only myisam is used as a format. > Here's the problem: On the Linux box it manages to push around > *5800*inserts/second while on the FreeBSD box > it's only *4000/*second. > > MySQL version is 5.1.51 > > During this load the disk subsystem on FreeBSD is pretty much idle (both the > SSDs and the SAS disks). CPU utilization > contributed to mysqld is only around 30%. So I am clearly heavily > under-utilizing the hardware. > Linuxthreads support for 64bit architectures is not available so I couldn't > try that but aside from that I tried recompiling > mysql with all the different Makefile options available without any effect. > Changing the recordsize in zfs to 8K doesn't make any difference. > Tried percona binary without any luck. > > Let me know what additional information would be useful and I'll provide it > here. > > Thank you in advance for your comments and suggestions. > > Cheers, > Rumen Telbizov > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.
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