Date: Fri, 21 May 2004 09:39:46 -0700 From: JG <amd64list@jpgsworld.com> To: freebsd-amd64@freebsd.org Subject: Re: Why is MySQL nearly twice as fast on Linux/AMD64 Vs.FreeBSD/AMD64? Message-ID: <5.2.0.9.2.20040521093359.015497f0@mail.ojoink.com> In-Reply-To: <5.2.0.9.2.20040521071750.0152ac40@mail.ojoink.com> References: <5.2.0.9.2.20040521035925.01463f88@mail.ojoink.com> <017001c43f18$d4ef6400$7b07000a@int.mediasurface.com> <200405202235.46755.Gregor.Bittel@GMX.de> <5.2.0.9.2.20040520122752.015eec60@mail.ojoink.com> <Pine.LNX.4.53.0405201129570.22287@sql01.internal.mikehost.net> <5.2.0.9.2.20040520122752.015eec60@mail.ojoink.com> <5.2.0.9.2.20040520141038.0432d130@mail.ojoink.com> <007701c43ec5$ff0a6fd0$b3db87d4@multiplay.co.uk> <00de01c43eeb$f2753220$b3db87d4@multiplay.co.uk> <Pine.LNX.4.53.0405202137240.22903@sql01.internal.mikehost.net>
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Compare the last set of benchmarks to these new ones.
Using Linux Mandrake64 and super-smack:
--------------------------------------------------------------------
SERVER CONFIG:
** Mandrake64 64-bit**
SMP Mon Apr 19 10:48:13 CEST 2004 x86_64 unknown unknown GNU/Linux
2.6.3-9mdksmp
MySQL: Ver 4.0.18 for mandrake-linux-gnu on x86_64 (Source distribution)
[root@amd64m]# ldd /usr/sbin/mysqld
librt.so.1 => /lib64/tls/librt.so.1 (0x0000002a9566d000)
libdl.so.2 => /lib64/libdl.so.2 (0x0000002a95786000)
libz.so.1 => /lib64/libz.so.1 (0x0000002a9588a000)
libcrypt.so.1 => /lib64/libcrypt.so.1 (0x0000002a9599d000)
libnsl.so.1 => /lib64/libnsl.so.1 (0x0000002a95ad0000)
libpthread.so.0 => /lib64/tls/libpthread.so.0
(0x0000002a95be8000) <-- eh?
libstdc++.so.5 => /usr/lib64/libstdc++.so.5 (0x0000002a95cfc000)
libm.so.6 => /lib64/tls/libm.so.6 (0x0000002a95eda000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000002a96033000)
libc.so.6 => /lib64/tls/libc.so.6 (0x0000002a9613e000)
/lib64/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2
(0x0000002a95556000)
---------------------------------------------------------------------
Each benchmark ran 4 times and highest was shown.
---------------------------------------------------------------------
REMOTE (Over 100mbit LAN dc0 to bge0):
- Using "Stock" Mandrake64 Install, without my.cnf
devbox# super-smack update-select.smack 30 10000
Query Barrel Report for client smacker
connect: max=65ms min=8ms avg= 20ms from 30 clients
Query_type num_queries max_time min_time q_per_s
select_index 300000 4 0 4441.59
update_index 300000 1 0 4441.59
- Using "Stock" Mandrake64 Install, with my-huge.cnf
but it compiled about max_connections @ 512 and dropped them to 457...
040521 1:17:42 Warning: setrlimit couldn't increase number of open files
to more than 1024 (request: 1134)
040521 1:17:42 Warning: Changed limits: max_connections:
100 table_cache: 457
devbox# super-smack update-select.smack 30 10000
Query Barrel Report for client smacker
connect: max=65ms min=0ms avg= 21ms from 30 clients
Query_type num_queries max_time min_time q_per_s
select_index 300000 5 0 4296.86
update_index 300000 15 0 4296.86
So the results above were the best so far.
Strange that using the my-huge.cnf would produce worse results.
I guess that's a question for the Mandrake list though.
Anyway, the closest FreeBSD came so far was under 32-bit i386 (on AMD64
hardware) :-(
- Using my-huge.cnf
- Using SCHED_4BSD kernel
- Using mysql compiled with linuxthreads
- (see a couple posts back for complete details)
devbox# super-smack update-select.smack 30 10000
Query Barrel Report for client smacker
connect: max=817ms min=37ms avg= 326ms from 30 clients
Query_type num_queries max_time min_time q_per_s
select_index 300000 2 0 3718.13
update_index 300000 9 0 3718.13
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