mysql中使用UDF自動同步memcached效率筆記

接上篇：mysql使用mysql-udf-http效率測試筆記 ，這次不使用rest架構，而是使用：libmemcached和memcached_functions_mysql，測試版本是：

libmemcached-0.34.tar.gz和memcached_functions_mysql-0.9.tar.gz，其它版本配對都有問題，我安裝測試過有問題的版本有：

複製代碼 代碼如下:memcached_functions_mysql-1.1在：
libmemcached-0.49\libmemcached-0.48\libmemcached-0.47\libmemcached-0.30\libmemcached-0.43\\libmemcached-0.42\
下安裝有錯誤
memcached_functions_mysql-0.10在：
libmemcached-0.42\下安裝有錯誤
memcached_functions_mysql-0.8在：
libmemcached-0.49\libmemcached-0.48\libmemcached-0.47\libmemcached-0.44\libmemcached-0.43\
\libmemcached-0.42\下安裝有錯誤

MySQL測試版本：5.1.55，作業系統Centos5.4 64bit，記憶體2G

安裝libmemcached-0.34和memcached_functions_mysql-0.9， 複製代碼 代碼如下:[root@sunss24 libmemcached-0.34]#./configure \
--with-memcached=/home/memcache/bin/memcached
[root@sunss24 libmemcached-0. 34]# make
[root@sunss24 libmemcached-0. 34]# make install
再運行一下memstat，算成功了
[root@sunss24 ~]# ln -s /usr/local/lib/libmemcached.so.3 /usr/lib/
[root@sunss24 ~]# cd memcached_functions_mysql-0.9
[root@sunss24 memcached_functions_mysql-0.9]# ./configure \
--with-mysql=/usr/local/mysql/bin/mysql_config \
--libdir=/usr/local/mysql/lib/
[root@sunss memcached_functions_mysql-0.9]# make && make install

安裝完成後將UDFs載入到MySQL中： 複製代碼 代碼如下:mysql> show variables like "%plugin%";
+---------------+-----------------------------------+
| Variable_name | Value |
+---------------+-----------------------------------+
| plugin_dir | /usr/local/mysql/lib/mysql/plugin |
+---------------+-----------------------------------+
1 row in set (0.00 sec)

[root@sunss ~]# find / -name "libmemcached_functions_mysql.so"
/usr/local/mysql/lib/libmemcached_functions_mysql.so
/root/memcached_functions_mysql-0.9/src/.libs/libmemcached_functions_mysql.so
You have new mail in /var/spool/mail/root
[root@sunss ~]# cp /usr/local/mysql/lib/libmemcached_functions_mysql.so /usr/local/mysql/lib/mysql/plugin/
[root@sunss ~]# cd memcached_functions_mysql-0.9/
[root@sunss ~]#cd sql/
mysql> source install_functions.sql;

查看各種版本： 複製代碼 代碼如下:mysql> select memc_udf_version();
+--------------------+
| memc_udf_version() |
+--------------------+
| 0.9 |
+--------------------+
1 row in set (0.00 sec)

mysql> select memc_libmemcached_version();
+-----------------------------+
| memc_libmemcached_version() |
+-----------------------------+
| 0.34 |
+-----------------------------+
1 row in set (0.00 sec)

mysql>

遇到問題： 複製代碼 代碼如下:No package 'libmemcached' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables DEPS_CFLAGS
and DEPS_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
解決辦法：
[root@sunss24 memcached_functions_mysql-0.9]# whereis pkgconfig
[root@sunss24 memcached_functions_mysql-0.9]# export \
PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/usr/lib/pkgconfig

匯出所有memcache內容：
使用：memcached-hack.zip
效率測試：
插入： 複製代碼 代碼如下:<?php
include_once("gettime.php");
$btime = getmicrotime();
$i = 0;
$mem = new Memcache();
$mem->addServer('192.168.0.10', 11212);
$local_db = mysql_connect("192.168.0.208", "sunss", "123456");
if(!$local_db)
{
die('Could not connect: '.mysql_error());
}
$local_db_sel = mysql_select_db("test", $local_db);
mysql_query("set names utf8", $local_db);
while ( $i < 1000) {
$re_sql = "insert into urls (id,url) values ($i, 'www.gongchang.com')";
$res = mysql_query($re_sql, $local_db);
$i++;
}
mysql_close($local_db);
$etime = getmicrotime();
$runTime = round($etime - $btime, 4);
echo "runTime: ".$runTime."\r\n";
?>

1000條，插入時間：runTime: 1.4072
刪除： 複製代碼 代碼如下:<?php
include_once("gettime.php");
$btime = getmicrotime();
$i = 0;
$mem = new Memcache();
$mem->addServer('192.168.0.10', 11212);
$local_db = mysql_connect("192.168.0.208", "sunss", "123456");
if(!$local_db)
{
die('Could not connect: '.mysql_error());
}
$local_db_sel = mysql_select_db("test", $local_db);
mysql_query("set names utf8", $local_db);
while ( $i < 1000) {
//$re_sql = "insert into urls (id,url) values ($i, 'www.gongchang.com')";
$re_sql = "delete from urls where id=".$i;
//echo "re_sql_1: ".$re_sql."\n";
$res = mysql_query($re_sql, $local_db);
$i++;
}
mysql_close($local_db);
$etime = getmicrotime();
$runTime = round($etime - $btime, 4);
echo "runTime: ".$runTime."\r\n";
?>

刪除1000條，已耗用時間：runTime: 1.5534
更新未作
結論：每秒query大概650條記錄，比上次的mysql-udf-http快多了