DB Connection Error?! Help With Debug Plz

At random times I seem to get DB connection errors .... Below is whats shown .... Can anyone help me understand what the issue could be please?

Thanks in advance :)

Debug backtrace:

Array
(
    [1] => Array
        (
            [file] => /var/www/vhosts/socialmunch.com/httpdocs/inc/classes/BxDolDb.php
            [line] => 82
            [function] => error
            [class] => BxDolDb
            [object] => BxDolDb Object
                (
                    [error_checking] => 1
                    [error_message] => 
                    [host] => localhost
                    [port] => 
                    [socket] => 
                    [dbname] => ************
                    [user] => *****
                    [password] => *****
                    [link] => 
                    [current_res] => 
                    [current_arr_type] => 1
                    [oParams] => 
                    [oDbCacheObject] => 
                    [_error] => 
                )

            [type] => ->
            [args] => Array
                (
                    [0] => Database connect failed
                    [1] => 1
                )

        )

    [2] => Array
        (
            [file] => /var/www/vhosts/socialmunch.com/httpdocs/inc/classes/BxDolDb.php
            [line] => 58
            [function] => connect
            [class] => BxDolDb
            [object] => BxDolDb Object
                (
                    [error_checking] => 1
                    [error_message] => 
                    [host] => localhost
                    [port] => 
                    [socket] => 
                    [dbname] => ************
                    [user] => *****
                    [password] => *****
                    [link] => 
                    [current_res] => 
                    [current_arr_type] => 1
                    [oParams] => 
                    [oDbCacheObject] => 
                    [_error] => 
                )

            [type] => ->
            [args] => Array
                (
                )

        )

    [3] => Array
        (
            [file] => /var/www/vhosts/socialmunch.com/httpdocs/inc/db.inc.php
            [line] => 25
            [function] => BxDolDb
            [class] => BxDolDb
            [object] => BxDolDb Object
                (
                    [error_checking] => 1
                    [error_message] => 
                    [host] => localhost
                    [port] => 
                    [socket] => 
                    [dbname] => ************
                    [user] => *****
                    [password] => *****
                    [link] => 
                    [current_res] => 
                    [current_arr_type] => 1
                    [oParams] => 
                    [oDbCacheObject] => 
                    [_error] => 
                )

            [type] => ->
            [args] => Array
                (
                )

        )

    [4] => Array
        (
            [file] => /var/www/vhosts/socialmunch.com/httpdocs/inc/classes/BxDolAlerts.php
            [line] => 20
            [args] => Array
                (
                    [0] => /var/www/vhosts/socialmunch.com/httpdocs/inc/db.inc.php
                )

            [function] => require_once
        )

    [5] => Array
        (
            [file] => /var/www/vhosts/socialmunch.com/httpdocs/inc/header.inc.php
            [line] => 177
            [args] => Array
                (
                    [0] => /var/www/vhosts/socialmunch.com/httpdocs/inc/classes/BxDolAlerts.php
                )

            [function] => require_once
        )

    [6] => Array
        (
            [file] => /var/www/vhosts/socialmunch.com/httpdocs/browse.php
            [line] => 21
            [args] => Array
                (
                    [0] => /var/www/vhosts/socialmunch.com/httpdocs/inc/header.inc.php
                )

            [function] => require_once
        )

)

Called script: /browse.php
Request parameters:

Array
(
)

anyone have a idea what might cause DB connection failed errors please ?

This right here. 

[0] => Database connect failed

I can think of only two posibilities.

1) Database server down
2) Database overloaded or at maxinium number of allowed connections.

Give that you said that it's random, then reason 2 is most likley.

I'm going to throw something out here..

looks like it's from the browse.php page.

Looking at that page, you have some "extra" members blocks down the right side. Try removing them one by one maybe. Who made those.?

what are your

max_connections
max_user_connections

settings in my.cnf??

you could use tuning_primer or MySQLTuner to check your mysql configuration ...

 hey man :)      well this happens at random times for random pages .... also happened to me on member.php

Oh and EU30 (i think that's the right developer)

 that file shows following stuff ...I would also be happy if you can advise on other changes I should make bearing in mind I have a very active network:-

skip-external-locking
key_buffer = 384M
max_allowed_packet = 1M
max_connections = 300
max_user_connections = 35
wait_timeout=40
connect_timeout=10
table_cache = 512
sort_buffer_size = 2M
read_buffer_size = 2M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size = 32M
thread_concurrency = 4

 can you advise how I check and change this if required ??

I will try and research this info also ... thanks

"2) Database overloaded or at maxinium number of allowed connections".

[0] => Database connect failed

Save this mysql-tuner script and run it on your machine (assuming you have shell access):

https://raw.github.com/rackerhacker/MySQLTuner-perl/master/mysqltuner.pl

Then check out the results... specificly:

[OK] Highest usage of available connections: 73% (147/200)

The longer your MySQL daemon has been up and running the better...

run it but don't have a clue what I'm looking at ... :(

Am still looking !

 I don't see anything like this there ...

*shrug* not sure what to say... Here's a snip from mine:

-------- Performance Metrics -------------------------------------------------

[--] Up for: 7d 2h 41m 23s (93M q [151.779 qps], 1M conn, TX: 37B, RX: 25B)

[--] Reads / Writes: 94% / 6%

[--] Total buffers: 212.0M global + 2.7M per thread (200 max threads)

[OK] Maximum possible memory usage: 749.5M (20% of installed RAM)

[OK] Slow queries: 0% (3K/93M)

[OK] Highest usage of available connections: 73% (147/200)

can anyone tell me if the following looks right OR should be adjusted in anyway for best performance of server please:

skip-external-locking
key_buffer = 384M
max_allowed_packet = 1M
max_connections = 300
max_user_connections = 35
wait_timeout=40
connect_timeout=10
table_cache = 512
sort_buffer_size = 2M
read_buffer_size = 2M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size = 32M
thread_concurrency = 4

 I suggest to use the following perl script to optimize your MySQL parameters - http://mysqltuner.com/

 Same as the link I posted above :)

DAMN ..... every now and then and for different things my members are getting DB connection failed errors ?!

This is a new issue for my network!  I have never had a issue with such prior to this thread ..........

Anyone advise further with this please !

 anyone ?!

 this does not give me any recommendations ?!

I run it several times and still same result ...

Sorry crack_foo, I didn't noticed this.

@Detective08 - try to change

max_connections = 300

to

max_connections = 1000