On Mon, Nov 29, 2004 at 11:50:20AM -0700, Sasha Pachev wrote: Hi,
> >Hello, > > > >For a few servers with > 1000 concurrent connections, > >I've compiled glibc 2.3.3 with a patched STACK_SIZE in > >linuxthreads/descr.h : > > > >#ifndef STACK_SIZE > >#define STACK_SIZE (128 * 1024) > >#endif > > > >instead of #define STACK_SIZE (2 * 1024 * 1024) > > > >This by the hints on the Documentation @ mysql.com > > > >But, now I notice: > > > >041125 15:15:34 mysqld started > >041125 15:15:34 Warning: Asked for 196608 thread stack, but got 126976 > >041125 15:15:35 InnoDB: Started > >/usr/local/mysql/libexec/mysqld: ready for connections. > > > > > >Is the 128K STACK_SIZE I've built glibc with too little, and should I > >update it to 256K ? > > Originally, MySQL team believed 128K was sufficient. Then some time later > it was discovered that some DNS resolving routines required a 192K stack in > some cases. So for safety reasons, mysqld was modified to request at least > 192K stack. In your case, your modification to glibc makes it impossible > for it to have a 192K stack, which is why you are getting the message. > However, if you run mysqld with --skip-name-resolve (you will need to > update your priv tables to use numeric addresses), glibc DNS routines are > never called, so 128K should be sufficient. I see :) With MySQL 4.1.8 and higher, I need to use a stack_size of at least 256K, else MySQL segfaults (signal 11) when started. This is with gcc-3.3.5 and glibc-2.3.3. Maybe something you guys should look into this some more, since it really boosts performance :) Also, I have one other question regarding this: When building with --with-other-libc, the build automatically changes to a static build. But, when using OpenSSL, it _must be_ a dynamic build, according to the configure-script. Does anyone have a clue on howto built with a custom glibc, but also have OpenSSL-support ? I really need it :) Thanks ! Kind regards, -- WideXS http://www.widexs.nl Wouter de Jong System-Administrator Tel +31 (0)23 5698070 Fax +31 (0)23 5698099 Bijlmermeerstraat 62, 2131 HG HOOFDDORP, NL -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
