( ! ) Warning: mysqli_real_connect(): (HY000/2002): No such file or directory in /var/www/clients/client0/web21/web/wp-includes/wp-db.php on line 1626
Call Stack
#	Time	Memory	Function	Location
1	0.0000	357504	{main}( )	.../index.php:0
2	0.0001	357784	require( '/var/www/clients/client0/web21/web/wp-blog-header.php' )	.../index.php:17
3	0.0001	358136	require_once( '/var/www/clients/client0/web21/web/wp-load.php' )	.../wp-blog-header.php:13
4	0.0001	358832	require_once( '/var/www/clients/client0/web21/web/wp-config.php' )	.../wp-load.php:37
5	0.0001	360264	require_once( '/var/www/clients/client0/web21/web/wp-settings.php' )	.../wp-config.php:96
6	0.0047	1066904	require_wp_db( )	.../wp-settings.php:126
7	0.0048	1079320	require_once( '/var/www/clients/client0/web21/web/wp-content/db.php' )	.../load.php:414
8	0.0052	1103272	W3TC\DbCache_Wpdb::instance( )	.../db.php:41
9	0.0056	1126992	W3TC\DbCache_WpdbNew->initialize( )	.../DbCache_Wpdb.php:53
10	0.0056	1126992	W3TC\DbCache_WpdbInjection_QueryCaching->initialize( )	.../DbCache_WpdbNew.php:104
11	0.0056	1126992	W3TC\_CallUnderlying->initialize( )	.../DbCache_WpdbInjection_QueryCaching.php:232
12	0.0056	1126992	W3TC\DbCache_WpdbNew->initialize( )	.../DbCache_WpdbNew.php:359
13	0.0056	1126992	W3TC\DbCache_WpdbInjection->initialize( )	.../DbCache_WpdbNew.php:104
14	0.0056	1126992	W3TC\DbCache_WpdbNew->default_initialize( )	.../DbCache_WpdbInjection.php:38
15	0.0056	1126992	W3TC\DbCache_WpdbNew->__construct( )	.../DbCache_WpdbNew.php:218
16	0.0056	1126992	W3TC\DbCache_WpdbNew->db_connect( )	.../wp-db.php:631
17	0.0056	1126992	W3TC\DbCache_WpdbNew->db_connect( )	.../DbCache_WpdbNew.php:97
18	0.0057	1128192	mysqli_real_connect ( )	.../wp-db.php:1626

( ! ) Warning: mysqli_real_connect(): (HY000/2002): No such file or directory in /var/www/clients/client0/web21/web/wp-includes/wp-db.php on line 1626

Call Stack

Time

Memory

Function

Location

0.0000

357504

{main}( )

.../index.php:0

0.0001

357784

require( '/var/www/clients/client0/web21/web/wp-blog-header.php' )

.../index.php:17

0.0001

358136

require_once( '/var/www/clients/client0/web21/web/wp-load.php' )

.../wp-blog-header.php:13

0.0001

358832

require_once( '/var/www/clients/client0/web21/web/wp-config.php' )

.../wp-load.php:37

0.0001

360264

require_once( '/var/www/clients/client0/web21/web/wp-settings.php' )

.../wp-config.php:96

0.0047

1066904

require_wp_db( )

.../wp-settings.php:126

0.0048

1079320

require_once( '/var/www/clients/client0/web21/web/wp-content/db.php' )

.../load.php:414

0.0052

1103272

W3TC\DbCache_Wpdb::instance( )

.../db.php:41

0.0056

1126992

W3TC\DbCache_WpdbNew->initialize( )

.../DbCache_Wpdb.php:53

0.0056

1126992

W3TC\DbCache_WpdbInjection_QueryCaching->initialize( )

.../DbCache_WpdbNew.php:104

0.0056

1126992

W3TC\_CallUnderlying->initialize( )

.../DbCache_WpdbInjection_QueryCaching.php:232

0.0056

1126992

W3TC\DbCache_WpdbNew->initialize( )

.../DbCache_WpdbNew.php:359

0.0056

1126992

W3TC\DbCache_WpdbInjection->initialize( )

.../DbCache_WpdbNew.php:104

0.0056

1126992

W3TC\DbCache_WpdbNew->default_initialize( )

.../DbCache_WpdbInjection.php:38

0.0056

1126992

W3TC\DbCache_WpdbNew->__construct( )

.../DbCache_WpdbNew.php:218

0.0056

1126992

W3TC\DbCache_WpdbNew->db_connect( )

.../wp-db.php:631

0.0056

1126992

W3TC\DbCache_WpdbNew->db_connect( )

.../DbCache_WpdbNew.php:97

0.0057

1128192

mysqli_real_connect ( )

.../wp-db.php:1626

No such file or directory

Error establishing a database connection

This either means that the username and password information in your wp-config.php file is incorrect or we can’t contact the database server at localhost. This could mean your host’s database server is down.

Are you sure you have the correct username and password?
Are you sure you have typed the correct hostname?
Are you sure the database server is running?

If you’re unsure what these terms mean you should probably contact your host. If you still need help you can always visit the WordPress Support Forums.