I have been having a problem with my redundant PostgreSQL setup over the last couple of weeks. I run two Postgres servers with a WAL Logging Warm Standby system using pg_standby from 8.3. When the master server is under heavy load and generating a lot of WAL traffic the secondary server has been tripping and going active.
After checking all the logs and putting pg_standby in debug mode there was still no clue as to why this was happening.
I have a Ubuntu Virtual Server handling all my mail, recently after an apt-get upgrade I was unable to send email using my Postfix Virtual User setup through Courier and SASL.
I kept getting the following error in my logs:
Aug 18 07:53:53 marvin postfix/smtpd[23938]: warning: SASL authentication failure: cannot connect to Courier authdaemond: No such file or directory Aug 18 07:53:53 marvin postfix/smtpd[23938]: warning: localhost[127.0.0.1]: SASL LOGIN authentication failed: generic failure
After consulting with Google for at least an hour i finally hit upon a page that helped me.
Monitoring & analysing your PostgreSQL server logs with PgFouine provides you with a way to see which queries are performing badly and need optimisation. It can also provide insight into busy periods and give some basic query stats such as the number of INSERT, DELETE, UPDATE, and SELECT operations.
When running a cluster of Mitel PABX’s it is likely that you will have them interconnecting in one way or another. If you send calls over your WAN connection then these graphs are for you.
There are two graphs added:
Bandwidth – Shows the current set bandwidth limit and usage figures for a Zone Access Point
Calls – Shows the number of calls both accepted or rejected by Bandwidth Management
I have a cluster of Mitel 3300 ICP PABX’s across several offices internationally and have been looking for a monitoring solution that can send alerts whenever an alarm is triggered on any one of the PABX controllers. Mitel already have a monitoring solution called Enterprise Manager, but this didn’t do what I wanted it to do. Enterprise Manager will send out emails based on certain policies and allow for issue escalation but its features are a little limited. I already have an extensive Nagios setup that will SMS and email for alerts, so I looked at integrating with this system.