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Several changes (software updates, pushing the edge of parallel processing) could explain why mySQL is hanging for no obvious reason.
IIRC, I never had issues with the DB residing on a Thunderbay + 4 x Mercury Extreme Pro configured in RAID5.
More recently I've switched to an Express TB3 + 4 x Toshiba RD-400. I remember reading that RD-400 weren't designed for RAID systems, but people at OWC told me that they didn't experience issues. But this is the nag that explains why I am suspecting hardware issue. Benchmarking (Black Magic) showed excellent results. The system works generally very well, but for the occasional hang, typically when there's a lot of read/write activity. Today it crashed on a FLUSH TABLES .. FOR EXPORT statement -- something innocuous that points to a hardware problem.
I'll move the DB back to the TB2 / Mercury enclosure.
If anyone can suggest diagnostic steps, I'd appreciate.
Thanks
Posted : 06/10/2019 3:35 pm
Unless MySL is doing something funky, it should not be able to trigger a panic/hang.
Try running AJA System test or black magic overnight. (AJA seems more intense)
5K video
RGBa
64GB file size, continuous.
If there is a hardware issue, AJA should help you trigger it.
Also, when this happened, run SoftRAID immediately and see if either a disk is missing, or in the log, if it shows a disk ejecting/hanging.
I don't see how there can be an issue. Samsungs have some Mac compatibility issues, with the top end lines, but I have not had any reports with toshibas.
Posted : 06/10/2019 4:13 pm
