<?php
$c = pg_connect( $connectionString, PGSQL_CONNECT_FORCE_NEW );
$queries = array (
"SELECT COUNT(*) AS data FROM articles",
"SELECT * FROM posts WHERE visible = TRUE",
"SELECT * FROM countries WHERE visible = FALSE",
"SELECT * FROM types WHERE visible = TRUE"
);
foreach ( $queries as $query ) {
$res = @pg_query( $c, $query );
if ( empty( $res ) ) {
echo "[ERR] " . pg_last_error( $c ) . "\n";
} else {
echo "[OK]\n";
}
}
上面的代码片段第一次生成:
[OK]
[OK]
[OK]
[OK]
但这是第二次:
[OK]
[OK]
[ERR] server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
[ERR] server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
这意味着某些缓存查询会导致问题。我们试图改变查询的顺序,但没有帮助。只有简单的查询,比如SELECT 1+8
可能没有缓存的,总是运行良好。
可以使用 psql 和可能的任何其他语言驱动程序(不仅是 PHP)模拟类似的问题。
当我们安装PostgreSQL 查询缓存时,所有的问题都出现了。
是否应该以某种方式配置查询缓存而不是这种方式?
我们的配置文件在这里: http ://pastebin.com/g2dBjba0 – pcqd_hba.conf http://pastebin.com/X9Y3zrjx – pcqd.conf