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25 views

Longest IPv4 Prefix Match using PostgreSQL

Given an IP address 192.168.0.1, and a table with a column next_hop_subnet storing subnet IP addresses, do you see any problem with the following PostgreSQL logic, accuracy or performance-wise: ...
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2answers
145 views

Multiple SELECT vs single SELECT over TCIP

My question is a performance one: I need to select roughly 400+ rows, i know their ids. currently i loop in code and fire off multiple queries over tcp/ip - because its easy: ... select [columns] ...
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0answers
13 views

High bandwidth on virtual IP

Description of the environment : An apache server (Drupal) connected to mysql server using a virtual IP. The problem : The (outgoing) bandwidth on VIP has exploded (after a new site version ...
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2answers
3k views

A transport-level error has occurred when sending the request to the server

In our Vb.net application(userd within a local network connection inside a office), which is used from long time now some of the users get the errors only sometimes a day A transport-level error ...
2
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0answers
534 views

Dropped Database Connections in SQL Server 2008R2

We are having an annoying intermittent problem where database connections from our client application on a variety of stations will get dropped. We have applications that use ODBC, Borland Database ...
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4answers
6k views

Changing IP address of SQL Server 2008 R2

I would like to know if there are any dangers or relevant precautions before changing the IP address of a SQL Server 2008 R2 box. We have a built a virtual PC with Windows Server 2008 R2 and SQL ...
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1answer
573 views

How Should TCP/IP be configured to allow an external application access to SQL via the same port #?

My SQL Server instance is hosted on an internal network server (10.x.x.x address). It's a named instance currently using dynamic ports. An external application at a third-party hosting location ...
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1answer
452 views

TCP sockets bottleneck with InnoDB/Debian?

We have a big mysql performance issue on a production environment with 18 "front" servers sending mysql queries to a unique mysql server. We are using Redis on each front server for a number of ...
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1answer
1k views

Howto disable Postgres listening on TCP?

Simply to avoid many problems in the first place I do not want my postgres server program to accept/listen to anything from any network (i.e. TCP/IP 4/6) connections. My setup is a Postgres 9.1 on ...
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2answers
7k views

Connecting to an external database with pgAdmin III

I'm trying to connect to an external database from pgAdmin III (which is installed on both machines). The client complains: Access to database denied The server doesn't grant access to the ...
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1answer
5k views

When is a Dynamic Port “dynamic”?

I was having a discussion today about Dynamic Ports with one of my co-workers and could use some help clarifying how they work. First question: If the IPALL TCP Dynmaic Ports setting is a specific ...