MySQL Timeout On Active Connections

Oct 21, 2009

unfortunately my server crashes a lot recently. What happens is that some application creates a MySQL connection which hangs and then MySQL gets overloaded and takes the whole server down.

My question:

1. How do I configure MySQL to time out even on active connections ? I.e. after 30 seconds kill the process no matter if it is still active or not. Is that possible ?

2. How do I exclude the root user from that?

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More Than 'max_user_connections' Active Connections

Jun 1, 2007

i am having an website like a webdirectory. BUT i am getting this error after every 5-10 mintues :

Warning: mysql_pconnect() [function.mysql-pconnect]: User USERNAME
has already more than 'max_user_connections' active connections in
/FIELPATH on line 93
Database error: pconnect(localhost,bstitne_netclass, $Password)failed.
MySQL Error)
Session halted.

PLEASE suggest how can i solve this. May be it is an server issue

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More Than 'max_user_connections' Active Connections

Apr 29, 2007

Since moving over to a new server, I have had to reboot my sql server about 5 times a day due to it crashing, and I always get the error:

Warning: mysql_connect() [function.mysql-connect]: User food_user has already more than 'max_user_connections' active connections in /home/food/public_html/includes/functions.php on line 9
Not connected : User food_user has already more than 'max_user_connections' active connections

I dont understand what is causing this...I used the tweaking guide as found on here and my.cnf file looks like this:

# Try number of CPU's*2 for thread_concurrency







Through my WHM, i went to "Show Mysql Processes" and heres what it displays

This problem has also occured on another one of my websites on the same server that makes use of mysql. Am I doing something wrong here? I dont think its the script because it ran for years on another server just fine.

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Timeout Error Starting MySQL

Nov 6, 2007

I'm having a bit of trouble here with MySQL, I don't know what to do. Centos 4.3, Mysql 4.1

Data is stored in /var/lib/mysql/

I'm looking to move that information to a second hard drive soon, and did a quick test of just copying it to another place on my existing drive. It won't start.


[root@localhost ~]# service mysqld start
Timeout error occurred trying to start MySQL Daemon.
Starting MySQL: [FAILED]

Error logs

071106 12:14:33 mysqld started
071106 12:14:33 [Warning] Can't create test file /var/lib/mysqltf/localhost.lower-test
/usr/libexec/mysqld: Can't change dir to '/var/lib/mysqltf/' (Errcode: 13)
071106 12:14:33 [ERROR] Aborting

071106 12:14:33 [Note] /usr/libexec/mysqld: Shutdown complete

071106 12:14:33 mysqld ended

071106 12:17:00 mysqld started
071106 12:17:00 [Warning] Can't create test file /var/lib/mysqltf/localhost.lower-test
/usr/libexec/mysqld: Can't change dir to '/var/lib/mysqltf/' (Errcode: 13)
071106 12:17:00 [ERROR] Aborting

071106 12:17:00 [Note] /usr/libexec/mysqld: Shutdown complete

071106 12:17:00 mysqld ended
I have tried even chmod 777ing the msyqltf folder (my copy) to no avail.


# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).



I've tried moving it to different locations. I even tried moving the original folder and renaming it, and still get this problem.

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Some Websites Load Slow + Mysql Timeout

Feb 5, 2007

I'm hosting about 6 private websites on my server, and some have problems.

My biggest website is a vb forum with 30.000 members and 1.5 million posts.

When i browse with firefox i see that vb forum loads fast, but phpads which is integrated on the top and footer loads very slow. When i browse with IE, it takes like 10 seconds before the whole site is loaded and sometimes IE even crashes.

When i try to login on another website / admin panel (oscommerce), i get a mysql gone away error, that means timeout. But why does it show that? I ran mysqlreport and can't find anything why it should display mysql gone away.
# ./mysqlreport
MySQL 5.0.15-standard uptime 3 19:36:47 Mon Feb 5 11:08:10 2007

__ Key _________________________________________________________________
Buffer usage 78.94M of 96.00M %Used: 82.23
Write ratio 0.60
Read ratio 0.00

__ Questions ___________________________________________________________
Total 19.61M 59.47/s
Slow 9 0.00/s %Total: 0.00 %DMS: 0.00
DMS 7.17M 21.74/s 36.56

__ Table Locks _________________________________________________________
Waited 7.57k 0.02/s %Total: 0.05
Immediate 16.50M 50.03/s

__ Tables ______________________________________________________________
Open 1.27k of 1800 %Cache: 70.56
Opened 1.82k 0.01/s

__ Connections _________________________________________________________
Max used 47 of 500 %Max: 9.40
Total 2.62M 7.95/s

__ Created Temp ________________________________________________________
Disk table 6.77k 0.02/s
Table 635.25k 1.93/s
File 50.37k 0.15/s

I can't find any problems on the server which may lead to this strange problem.

The server load is normal, around 1 to 1.5. No weird errors in the apache error log or system log.

This strange behaviour started 2 weeks ago, and appears 2 to 3 time a week.

The system is running:
centos 4.3 64-bit
kernel #1 SMP
directadmin 1.29.0
mysql 5.0.15
php 5.2
apache 2

Zend optimizer 3.2.0
Eaccelerator 1.95

One thing i noticed is that every night when the directadmin cron finished, the server acts normal again.

The directadmin cronjobs are:
* * * * * root /usr/local/directadmin/dataskq
2 0-23/6 * * * root echo 'action=vacation&value=all' >> /usr/local/directadmin/data/task.queue;
#5 5 * * 0 root /sbin/quotaoff -a; /sbin/quotacheck -augm; /sbin/quotaon -a;
20 4 1 * * root echo 'action=reset&value=all' >> /usr/local/directadmin/data/task.queue
0 4 * * * root echo 'action=check&value=license' >> /usr/local/directadmin/data/task.queue
10 0 * * * root /usr/local/directadmin/plugins/awstats/hooks/cgi-bin/ now -awstatsprog=/usr/local/directadmin/plugins/awstats/hooks/cgi-bin/ && echo 'action=tally&value=all' >> /usr/local/directadmin/data/task.queue

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Timeout Error Occurred Trying To Start MySQL Daemon

Oct 30, 2009

I just installed mySQL server on a brand new dedicated server and am getting Timeout error occurred trying to start MySQL Daemon. I have uninstalled and reinstalled it a few times and am still getting the same error.

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Timeout Error Occured Trying To Start MySQL Daemon

May 10, 2007

I am getting the error (as listed in the title) on my server. This is a BRAND NEW FRESH install on a brand new server...

OS: Unix Fedora
Kernel Version: Kernel 2.6.18-1/2798.fc6 on an i686
Hardware Information: Brand new Dell SC1435 Server
Software Version: MySQl 5
Control Panel: Nothing yet

Apache starts ok but when I go to strart MySQL I get the following error...

[root@server112]# /etc/rc.d/init.d/mysqld start
Timeout error occurred trying to start MySQL Daemon
Starting MySQL: [FAILED]

Does anyone have any ideas?
I did some pretty extensive searching...
Web Hosting Talk article that basically describes the same error. I followed everything as listed in his suggestion and it didn't change anything.

Also Checked here but this didn't work either.

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MySQL Max Connections

Jan 16, 2008

My PHP application is starting to reach max mysql server user connections limit (currently set to 60). I listed mysql process list in phpmyadmin and found there lot of queries with status "LOCKED" these hang there for a long time(not always just sometimes - twice a day) and then connection limit is reached. It causes load average about 40 for as long as 10 - 20 minutes

I think it may be bacause of query structure. There are some queries with many inner joins...

Here is typical situation from phpmyadmin's process list:

1. select ... from table_1
inner join table_2
inner join table_3
inner join table_4
inner join table_5
This show status : "Copying to tmp table" in phpmyadmin

2. update table_2 set ....

This shows status: Locked

3. select ... from table_2

This shows status: Locked

Seems then when temp table is being created the table_2 is locked and it cannot make update to table_2. or maybe it's locked because of just that update on table_2.

I want to avoid of creating temp tables... Can it help if I'll make separate selects without large table joins ?

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MySQL Max- Connections

Jan 7, 2007

I'm currently using MySQL 4.1.12 for Windows 2003, and I need to know how much possible connections can MySQL achieve? I'm currently around 650. I'm having 4 new servers online, and that will bring my total concurrent connections to 1000+.

how high it can go?

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MySQL Connections

May 24, 2007

I notice that most hosting have limit of mySQL connections.

If the max mySQL connections is 50 and I run a forum on this hosting,about how many people can visit my website at one time?

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Closing Mysql Connections

Feb 18, 2007

from what I view, wait_timeout is used for disconnecting connections. However, it applies to tcp/ip connection only. So, in my database connection, if I am using mysql server as localhost, that variable is not applied? In that case, how can I close connections automatically after xxx seconds?

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Mysql Connections Topping Out Within Seconds

May 13, 2009

i have a small cluster (one web and one db) setup and i host a rather popular group of 4-5 sites that allow users to dynamicly create their own mobile chat communitys automaticly. each site gets its own mysql db created and populated automaticly.

this is all fine,

but in the last 24hours weird things have begun happening, previously i had the sql max_connections set to 500 and this was perfectly adquate for the demand but now even when i set the connection to 4000+ they are all maxxed out within 5-10 minutes, and mysql processlist shows thousands of unauthenticated user connections sitting at login status,

i have gone through the sites and all their mysql configs are fine so i cant see what the issue is.

server specs below

db server:
dual amd opteron 246
8GB ram
120gb hd(64gb free)
33gb swap (rarly used but their for emergencys)
centos 5 64bit.
direct 100mbit lan to web serv
only mysql,ssh and webmin running, no other apps installed

web server:
amd athlon 64 3800+
plesk 9.2.1
4gb ram
2x120gb hds

apache status onthe web server only shows 120ish http connections but the sql keeps climbing

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[MySQL] Too Many Connections: Locked Queries

Dec 17, 2008

This has happened twice now. I have my wait_timeout variable set to 60 seconds, but occasionally my database gets overloaded with "locked" queries. Here's an example of my processlist:

| 14773848 | db_name | localhost | db_name | Query | 35483 | statistics | SELECT COUNT... |
| 14776290 | db_name | localhost | db_name | Query | 35144 | statistics | SELECT COUNT... |
| 14778877 | db_name | localhost | db_name | Query | 34841 | statistics | SELECT COUNT... |
| 14790744 | db_name | localhost | db_name | Query | 33056 | Locked | UPDATE... |
| 14791275 | db_name | localhost | db_name | Query | 32977 | Locked | SELECT... |
| 14791395 | db_name | localhost | db_name | Query | 32960 | Locked | SELECT... |
| 14791556 | db_name | localhost | db_name | Query | 32929 | Locked | SELECT... |
| 14791603 | db_name | localhost | db_name | Query | 32924 | Locked | SELECT... |
| 14791757 | db_name | localhost | db_name | Query | 32900 | Locked | SELECT... |
| 14792209 | db_name | localhost | db_name | Query | 32815 | Locked | SELECT... |
| 14792355 | db_name | localhost | db_name | Query | 32786 | Locked | SELECT... |

This continues on with locked queries all the way up to my limit of 450 connections, then the whole server goes down. Note the time spent processing these queries, 35483 seconds and counting! Surely the wait_timeout is supposed to prevent this from happening?!

Also, this appears to start with queries in the State "statistics". Then the State for the following queries becomes "locked". Does anyone know what these mean? Can I get them to timeout normally? Queries which never timeout are guaranteed to bring your server down eventually, surely this is not the desired behaviour.

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Best Host For Fast MySQL Connections

Aug 12, 2008

for a linux web host that has extremely fast mysql connections, 100GB of bandwidth, and the amount of space has to be at least 1GB. Price doesn't really matter.

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Apr 3, 2008

Recently I've upgraded my MySQL server. I connect to it via a conection from NIC to NIC (Internal IP addresses). Since the upgrade/format, I've managed to get everything back to the way it was. Everything works fine for 15-20 minutes. Then the PHP server can no longer access the MySQL server.

I tried logging in from the PHP server, I get access denied. I then tried logging in locally, on the MySQL server and I get in fine...

It's not like it's a firewall issue though, it's strange...

I tried updating PHP/MySQL to a few releases, even the RC's to no avail...

Something to note is that when I try restarting MySQL it can take 4-5 minutes, sometimes not even complete.

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Jun 22, 2007

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Aug 6, 2007

at my logs, i can see this timeout error caused my mod_security at my rhes 4 server.

mod_security-message: Access denied with code 403. Error reading request body, error code 70007: The timeout specified has expired [severity "EMERGENCY"]

I didnt specify any mod sec rule about "timeout", what timeout is this about?

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Aug 22, 2007

I have a message in queue for about 24 hours and checking the delivery log I found this.

cwd=/usr/local/cpanel/whostmgr/docroot 4 args: exim -v -M 1INUw5-0007VU-DZ
delivering 1INUw5-0007VU-DZ
Connecting to []:25 ... connected
SMTP>> EHLO svr01.xx***********
250-SIZE 20971520
SMTP<< 250 Ok
SMTP<< 450 Client host rejected: cannot find your hostname, []
SMTP<< 554 Error: no valid recipients

I have checked dnsreport for this domain and found this

WARNING: One or more of your mailservers is claiming to be a host other than what it really is (the SMTP greeting should be a 3-digit code, followed by a space or a dash, then the host name). If your mailserver sends out E-mail using this domain in its EHLO or HELO, your E-mail might get blocked by anti-spam software. This is also a technical violation of RFC821 4.3 (and RFC2821 4.3.1). Note that the hostname given in the SMTP greeting should have an A record pointing back to the same server. Note that this one test may use a cached DNS record.

***********.co claims to be host svr01.xx*********** [but that host is at 74.xx.xx.2 (may be cached), not]. <br />

What should i do to correct this error? btw, I host about 100 sites on this server.

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Jan 18, 2007

although mod_rewrite is active but htaccess i not read why?

and how can i know mod_rewrite is active or not?

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Jul 31, 2009

I am using Windows Server 2003 SP2 Standard Edition. I have installed Active directory and created users and their home folders. Everything works fine except a problem.

When a user from the domain uses the UNC to connect to the server, it shows the shared folder. The user can view and change all other users files, home directory etc. The user can browse all the folders.

I need it to be setup so that the user can only view his own home folder and files and not others. Also when using UNC to browse the server, I want an administrator authentication even if the user is from the same domain.

Here are my current permissions.

NTFS Root folder permission
Administrators - Full Control
CREATOR OWNER - Special Permission
System - Full Control
Domain Users - Read & Execute, List Contents, Read, Special Permissions.

Share permission of root folder
Domain Users - Read

NTFS Permission for user home folders
Created User - Full Control
Administrators - Full Control
CREATOR OWNER - Special Permission
System - Full Control
Domain Users - Read & Execute, List Contents, Read, Special Permissions.

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Aug 4, 2009

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Sep 9, 2008

I've been with Bluehost for over three years. I've really not had any big problems with them. But I've learned that people usually don't have problems with hosts unless they actually have a website that has good traffic.

Well, as my main site has grown, I think I'm outgrowing my host.

I have a forum (SMF) with over 1500 members and close to 80K posts. It's got a good core of very active members. Doing well. The main part of the site is on WP platform.

Friday, I try to bring up the forum and POOF! It's not there. Just a blank screen. No error, no nothing. Call support and they have no clue, but the support guy comments out a line in one of my SMF files and the site comes back up. Don't ask me how he knew to comment out that line or anything.

Things go fine for a few days, then yesterday P.M. I start getting "exceeding CPU" errors and then a 500 error. Keep in mind, I've done nothing to my site in these days to cause any of this or any changes to even make me suspect anything.

Called support two times last night and finally was told to submit a ticket to their scripting department. I could see the PHP errors in my CP and I knew it was something wrong on their end, but no one could figure it out. Well, I haven't heard from support but my site's back up today.

I'm just thinking it may be time to consider switching. Not sure I really want to deal with that, but I'm having more errors and glitches with them in the last year.

I know HostGator gets mostly great reviews. Will my experience there be any different though?

I know lots of people here ask for web host suggestions. I could really use some guidance, not just in companies, but the things I need to keep in mind about my site in particular that would help me choose one.

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Oct 22, 2007

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Mar 18, 2007

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Nov 14, 2007

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Oct 31, 2007

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now my question is

if userB also opened socket application in SessionB with same portno ,then which soket application will recive data from the units...whther the applictaion from sessionA or from SessionB?

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