>Description:
netinet/ip.h and netinet/tcp.h are not included during compilation.
This causes extremely slow remote access if the last data packet is smaller
than MTU of underlying network layer, because TCP_NODELAY socket option
is not set.
>How-To-Repeat:
1. Get 3.23.33 source code from mysql.com
2. expand the tar ball
3. ./configure
4. make
5. Then you get a server and client programs without TCP_NODELAY on sockets.
This problem repeats on
* RedHat 6.2 default installation
* FreeBSD R4.1 default installation
* Kondara 1.1 Linux default installation
>Fix:
Just ADD following 2 lines
#include <netinet/ip.h>
#include <netinet/tcp.h>
in libmysql/violite.c and sql/violite.c.
because TCP_NODELAY is defined in netinet/tcp.h, and also
IPTOS_THROUGHPUT is defined in netinet/ip.h.
IPTOS_THROUGHPUT seems to be necessary to use TCP_NODELAY.
>Submitter-Id: <submitter ID>
>Originator:
>Organization:
<organization of PR author (multiple lines)>
>MySQL support: none
>Synopsis: TCP_NODELAY is not used when I compile mysql source code
>Severity: serious
>Priority: medium
>Category: mysql remote access
>Class: sw-bug
>Release: mysql-3.23.33 (Source distribution)
>Server: /usr/local/bin/mysqladmin Ver 8.7 Distrib 3.23.21-beta, for pc-linux-gnu on
>i686
TCX Datakonsult AB, by Monty
Server version 3.23.21-beta
Protocol version 10
Connection Localhost via UNIX socket
UNIX socket /tmp/mysql.sock
Uptime: 21 days 30 min 10 sec
Threads: 1 Questions: 54501558 Slow queries: 19 Opens: 8827 Flush tables: 1 Open
tables: 7 Queries per second avg: 30.008
>Environment:
<machine, os, target, libraries (multiple lines)>
System: Linux roo 2.2.14-5k4 #1 Sun Mar 12 15:33:30 PST 2000 i686 unknown
Architecture: i686
Some paths: /usr/bin/perl /usr/bin/make /usr/bin/gmake /usr/bin/gcc /usr/bin/cc
GCC: Reading specs from /usr/lib/gcc-lib/i586-redhat-linux/2.95.3/specs
gcc version 2.95.3 19991030 (prerelease)
Compilation info: CC='gcc' CFLAGS='' CXX='c++' CXXFLAGS='' LDFLAGS=''
LIBC:
lrwxrwxrwx 1 root root 13 Jun 14 2000 /lib/libc.so.6 -> libc-2.1.3.so
-rwxr-xr-x 1 root root 5224080 Mar 10 2000 /lib/libc-2.1.3.so
-rw-r--r-- 1 root root 20568374 Mar 10 2000 /usr/lib/libc.a
-rw-r--r-- 1 root root 178 Mar 10 2000 /usr/lib/libc.so
Configure command: ./configure
Perl: This is perl, version 5.005_03 built for i586-linux
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