September 2018
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September 2018
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MySQL: Calculate the free space in IBD files

If you use MySQL with InnoDB, chances are you’ve seen growing IBD data files. Those are the files that actually hold your data within MySQL. By default, they only grow — they don’t shrink. So how do you know if you still have free space left in your IBD files?

There’s a query you can […]

Apache 2.4 AH01762 & AH01760: failed to initialize shm (Shared Memory Segment)

Apache 2.4 AH01762 & AH01760: failed to initialize shm (Shared Memory Segment)

Mattias Geniar, Tuesday, January 12, 2016

I recently ran into the following problem on an Apache 2.4 server, where after server reboot the service itself would no longer start.

This was the error whenever I tried to start it:

$ tail -f error.log […]