502 Bad Gateway в PHPMyAdmin при импорте дампа

[Alexey Bobok <alexey.bobok@xxxxxxxxx>]

Здравствуйте.
Есть связка   Inet - nginx (внешний IP) - Apache(127.0.0.2)
При аплоаде файла дампа sql-баз (2,65 Mb) возникает ошибка
502 Bad Gateway
вот что в логах nginx:
##############
2007/09/18 10:18:53 [warn] 85681#0: *172 a client request body is buffered to a 
temporary file
/var/tmp/nginx/client_body_temp/0000000003, client: 89.252.*.52, server: 
phpma.*.*.kiev.ua,
URL: "/import.php", host: "phpma.*.*.kiev.ua",
referrer: 
"http://phpma.*.*.kiev.ua/server_import.php?token=7dcc2f606674b18493a80bc1fec69d50";

2007/09/18 10:19:29 [error] 85681#0: *172 upstream prematurely closed 
connection while
reading response header from upstream, client: 89.252.*.52, server:
phpma.*.*.kiev.ua, URL: "/import.php", upstream: 
"http://127.0.0.2:80/import.php";, host: "phpma.*.*.kiev.ua", referrer:
"http://phpma.*.*.kiev.ua/server_import.php?token=7dcc2f606674b18493a80bc1fec69d50";
###############
Логи Апача в примерно ето время:
################
89.252.*.52 - root [18/Sep/2007:10:18:35 +0300] "GET 
/server_import.php?token=7dcc2f606674b18493a80bc1fec69d50 HTTP/1.0" 200 11890
89.252.*.52 - root [18/Sep/2007:10:19:29 +0300] "POST /import.php HTTP/1.0" 200 
-
################


в php.ini:
post_max_size = 512M
upload_max_filesize = 512M

**********************

в httpd.conf:
Timeout 15
KeepAlive On
MaxKeepAliveRequests 1000
KeepAliveTimeout 15
MinSpareServers 5
MaxSpareServers 5
StartServers 10
MaxClients 100
MaxRequestsPerChild 15000
**********************


в nginx.conf:
## Секция http
    keepalive_timeout  90;
    send_timeout 90;
    tcp_nodelay        on;
    proxy_buffering    on;
    proxy_connect_timeout 75;
    proxy_ignore_client_abort on;
    gzip  on;
    server_names_hash_bucket_size 64;
    client_max_body_size 1024M;
    client_header_timeout 90;
    gzip_buffers 4 4k;
    gzip_proxied any;
    gzip_comp_level 5;
## в субдомене:
       location ~ \.php$ {
           proxy_pass   http://127.0.0.2:80;
           proxy_redirect      off;
           proxy_set_header    Host    $host;
           proxy_set_header    X-Real-IP        $remote_addr;
           proxy_set_header    X-Forwarded-For  $proxy_add_x_forwarded_for;

############################

В чем может быть трабла?

-- 
С уважением,
Алексей Бобок                           mailto:alexey.bobok@xxxxxxxxx