The tag has no wiki summary.

learn more… | top users | synonyms

0
votes
1answer
727 views

Why does max_connections in my.ini not match concurrent connections in Mysql instance config wizard?

MySQL 5.1.x | Windows Server 2003 Can someone please clarify why max_connections in my.ini is much larger than the manual value I specify in the Concurrent Connections Dialogue? For example, if I ...
0
votes
1answer
1k views

MySQL PDO Cannot assign requested address

Can someone help me with this error? [08-Apr-2013 17:44:08 Europe/Berlin] PHP Warning: PDO::__construct(): [2002] Cannot assign requested address (trying to connect via tcp://****:3306) in ...
4
votes
2answers
345 views

How to understand the PostgreSQL discrepancy between connection pool recommendation ((2 * n_cores) + n_disks) and support for 100s of connections?

From PostgreSQL docs: Number of Database Connections -> How to Find the Optimal Database Connection Pool Size for optimal throughput the number of active connections should be somewhere near ...
0
votes
1answer
98 views

too many connection error mysql: how to calculate max_connections

how to calculate this values to get the best results to resolve this error "too many connection error mysql" and make my API faster in mysql wait_timeout = ?? max_connections = ?? ...
0
votes
1answer
29 views

What is the meaning of “available RAM” for calculating MySQL max_connections

The question was asked previously, "how do I calculate MySQL max_connections" and this was the answer: max_connections = (Available RAM - Global Buffers) / Thread Buffers Since I don't have ...
0
votes
1answer
392 views

MySQL max_connection value

Questions I got a 12 GB machine with apache & myqsl, i have may apache max_client set to 150 will this cause some bottlenecks with the 50 max_connection in mysql? What value should I set mysql ...
2
votes
1answer
873 views

pt-heartbeat showing “Host is blocked because of many connection errors”…but connections are well under limit

I'm running MySQL in a master-slave configuration. pt-heartbeat is showing "Host is blocked because of many connection errors"...but connections are well under limit (limit is 600 connections, MySQL ...
1
vote
1answer
2k views

Show processlist / Max concurrent connections seem to max out at 131

When I put my database under a load test (basically just a basic write and basic read from our app), and run show processlist; in the middle of it, there is always 131 rows in the set and that's it. ...
1
vote
2answers
591 views

multiple connections on MySQL database with no users on httpd

My database seems to have many open connections despite having no users on httpd. mysql> SHOW PROCESSLIST; ...
0
votes
1answer
96 views

Find the last SQL statement executed for a given connection

MySQL running on Windows 7 64 bit. I'm trying to track down a leak of connections, I'm pretty sure the only ASP.NET app using the server is at fault here. We received the "Too many connections" ...
19
votes
3answers
14k views

How do you calculate mysql max_connections variable?

How do you calculate mysql max_connections ? What do you take into consideration ?
0
votes
3answers
116 views

Can we restrict the number of connections to a database in SQL Server?

I have a database on SQL Server. My web application contacts this database. Is there a way in which I can restrict the number of connections to this database through some settings on the SQL Server?
1
vote
2answers
2k views

How can I determine the maximum possible number of threads?

What factors determine the maximum possible number of threads mysqld will create? I only care about consideration for mysql and not limitations that may be imposed by the operating system. Further, I ...
5
votes
1answer
661 views

Does PgBouncer create a separate pool for every database config entry?

If I set up a pgbouncer.ini config file with several database entries, does pgBouncer create a separate pool for each one? I would think so, but have not been able to confirm this. For example, ...
3
votes
1answer
284 views

Does the mysql parameter “max_connections” apply for unix socket connections?

The documentation does not specify if max_connections apply only to TCP connections. The way it is said, it looks like it does apply for any kind of connection, but I'd like to be sure because ...
0
votes
1answer
11k views

How to get rid of “maximum user connections” error ?

I am using MySQLi for my webapp but whenever I want to visit some particular page, I get mysqli_connect() [function.mysqli-connect]: (42000/1203): User ***_user already has more than ...
0
votes
0answers
89 views

MySQL max_connections Changed Without Notice

I'm running a Linux (512MB of RAM) server with MySQL 5.1. I host an app that is used by a small # of users (less than 50). Everything has been working fine until yesterday, connecting to my DB would ...
2
votes
0answers
368 views

How to properly configure pgBouncer transaction level pooling?

What is a good way to determine the number of available transaction connections when using pgBouncer to pool database connections? Also, how should I determine the number of max_connections and ...
0
votes
1answer
1k views

mysql fine tuning: open_tables, opened_tables

I'm a novice to database administration and have been depending on forum suggestions and answers to help resolve my database hang ups and too many connections errors; I've managed to reduce the ...
0
votes
1answer
700 views

Mysql not closing connections

I have a Java application that configured with a connection pool. I have ensured that the application terminates the connections properly. However when I run this command on mysql command line - ...
0
votes
0answers
29 views

Max connections sql server express could have? [duplicate]

Possible Duplicate: Max connections SQL Server Express could have? I have sql server 2005 express edition installed on one of my client's machine, and lots of other users are also connected ...
3
votes
1answer
378 views

Named pipes connection closed when subjected to load

We're hosting a service where we have a messaging service. When a message arrives, it checks which subscribers it should be sent to by connecting to the database, and querying the subscriptions ...
1
vote
1answer
4k views

Why does max_used_connections status not get refreshed automatically once it reaches max_connections, even though the Threads_connected falls down

I always wonder, why does the max_used_connections value not come down, once it reaches the peak value of max_connections? I always flush the status and bring down this value to avoid DB connection ...
1
vote
1answer
202 views

Sudden MySQL connection issue

We have almost 60 network guys working via a proxy server, developing on one Linux-based in-house server. Suddenly, it is saying to everyone: Warning: mysql_connect() [function.mysql-connect]: Too ...
1
vote
2answers
1k views

Too many TIME_WAIT connections in PostgreSQL

I am using PostgreSQL 9.0 on Centos 5.7 Final. At any given there are around 1,500-2,200 connections open for PostgreSQL on port 5432 which are in TIME_WAIT state. I have a feeling this is not good. ...
1
vote
1answer
506 views

“Mysql server has gone away” debugging methods

I have been repeatedly facing the issues with mysql on my server recently. I have tried changing "wait_timeout" , "connect_timeout" and several options which I found using google. Are there any ...
1
vote
2answers
1k views

Is problem with parallelism more common today than before? And what issues can arise from paralellism?

This is a very general question so I don't give much specific information. I am more interested in parallelism and its possible drawbacks. Generally I am all for parallelism as something useful and ...
5
votes
1answer
2k views

What are user connections - when are the created and destroyed?

We've been getting an intermittent error on out site: Warning: mysql_connect() [function.mysql-connect]: User '557574_prod' has exceeded the 'max_user_connections' resource (current value: 10) ...