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Lowering the Noise


Lowering the Noise

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Steve Jones
Steve Jones
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Comments posted to this topic are about the item Lowering the Noise

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Ralph Hightower
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I am the developer for a web application and also support the application. I developed a Windows service that runs on a scheduled basis to see that it can retrieve the login page from the web server and that it can connect to the database and run a query. For problems related to the web server, it notifies the server hosting team. For problems related to the database, it notifies the DBA team. Once an error has been detected, it switches to a longer polling interval to give the team a chance to respond to and fix the problem. For afterhours, weekends, and holidays, the polling interval is longer than it would be during working hours. When connecting to the database, if it gets the "host not found" error, it notifies the server hosting team, besides the DBA team, because the VM or the server hosting the VM may be down.

I've used the same monitoring application as a shell to monitor two other systems that were extremely fragile; both applications have been retired. One of those systems used a PostgreSQL database. The other system was prone to database corruption, so I wrote a query and analysed the result to find out if a non-numeric character got into a column that was supposed to contain integers (the column is a character field). That database was a bizarre design, using character columns to store dates instead of using the date data type. Good riddance to that system!
Eric M Russell
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Where I work, we use both SentryOne and SolarWinds. Honestly, I could spend more time familiarizing myself with the tools. Getting an alert every time an event falls outside a set of predefined threshold parameters can result in a LOT of alerts, especially when monitoring dozens of transactional servers. When it comes to monitoring, what I've instead found to be most useful is baseline analysis. Don't tell me when something potentially bad is happening, instead tell me when something out of the ordinary happens.


"The universe is complicated and for the most part beyond your control, but your life is only as complicated as you choose it to be."
Jeff Mlakar
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What I would give to see all client environments have just disk monitoring to prevent them from filling up and stopping the show...
Steve Jones
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jmlakar 69347 - Tuesday, January 30, 2018 8:45 AM
What I would give to see all client environments have just disk monitoring to prevent them from filling up and stopping the show...


There are fairly simple scripts that can help here. Scan for xx space, send an email / page / net send. The other thing to do is create placeholders that give you time to respond: https://voiceofthedba.com/2014/12/01/creating-placeholder-files/

Follow me on Twitter: @way0utwest
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Jeff Mlakar
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Steve Jones - SSC Editor - Tuesday, January 30, 2018 9:00 AM
jmlakar 69347 - Tuesday, January 30, 2018 8:45 AM
What I would give to see all client environments have just disk monitoring to prevent them from filling up and stopping the show...


There are fairly simple scripts that can help here. Scan for xx space, send an email / page / net send. The other thing to do is create placeholders that give you time to respond: https://voiceofthedba.com/2014/12/01/creating-placeholder-files/

Thanks Steve! I also love the SysInternals suite. Just wishing these same issues which have been solved for decades were not so common.

ZZartin
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Generally what I want is a system that will tell me when there's an issue, what I do not want is someone sticking a "This job succeeded" notification onto the end of every job in existence. I have a rule in outlook that sends anything in that category directly to a folder called daily junk. On the other hand I also have rules that send alerts from production systems or other alerts worthy of immediate attention to a specific high priority folder so i know if i see something there it needs to be looked at.
bpwilso
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jmlakar 69347 - Tuesday, January 30, 2018 9:54 AM
Steve Jones - SSC Editor - Tuesday, January 30, 2018 9:00 AM
jmlakar 69347 - Tuesday, January 30, 2018 8:45 AM
What I would give to see all client environments have just disk monitoring to prevent them from filling up and stopping the show...


There are fairly simple scripts that can help here. Scan for xx space, send an email / page / net send. The other thing to do is create placeholders that give you time to respond: https://voiceofthedba.com/2014/12/01/creating-placeholder-files/

Thanks Steve! I also love the SysInternals suite. Just wishing these same issues which have been solved for decades were not so common.


I've typically held onto another volume that I can expand my primary into if needed. I also had a script that I should have saved that would mount the other volume and symlink back to the original. I can't tell you how many times that saved me to be able to just resize on the fly to whatever the admin would allow me to. This of course was all because I was afforded a secondary volume that was the same size of my primary volume.
bpwilso
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Steve Jones - SSC Editor - Tuesday, January 30, 2018 9:00 AM
jmlakar 69347 - Tuesday, January 30, 2018 8:45 AM
What I would give to see all client environments have just disk monitoring to prevent them from filling up and stopping the show...


There are fairly simple scripts that can help here. Scan for xx space, send an email / page / net send. The other thing to do is create placeholders that give you time to respond: https://voiceofthedba.com/2014/12/01/creating-placeholder-files/


I love this. I use this tactic frequently in Linux environments to reserve space. Also wrote custom login scripts such that if there was low disk space, restarting the server would clear out a file or two to get some space back to work on the system. Not a frequent issue any longer though.
Eric M Russell
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bpwilso - Tuesday, January 30, 2018 4:53 PM
Steve Jones - SSC Editor - Tuesday, January 30, 2018 9:00 AM
jmlakar 69347 - Tuesday, January 30, 2018 8:45 AM
What I would give to see all client environments have just disk monitoring to prevent them from filling up and stopping the show...


There are fairly simple scripts that can help here. Scan for xx space, send an email / page / net send. The other thing to do is create placeholders that give you time to respond: https://voiceofthedba.com/2014/12/01/creating-placeholder-files/


I love this. I use this tactic frequently in Linux environments to reserve space. Also wrote custom login scripts such that if there was low disk space, restarting the server would clear out a file or two to get some space back to work on the system. Not a frequent issue any longer though.

To reserve disk space for your database files to grow, why not just initialize or re-size the files to the appropriate size?

Creating placeholder files might be confusing to another DBA who is trying to resolve a disk space issue, but certainly make the file name descriptive in a way that someone else knows they can safely delete it if needed.



"The universe is complicated and for the most part beyond your control, but your life is only as complicated as you choose it to be."
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