Re: ZFS on AMD64 - any recent crashes?

Ivan Voras wrote:
Hi,

In light of the recent discussion about ZFS stability, does anyone still have kmem_map_too_small panics on AMD64 after tuning it (as presented in http://wiki.freebsd.org/ZFSTuningGuide)?

I'm interested in reports like this: http://kerneltrap.org/mailarchive/freebsd-current/2007/9/21/271557 (note that this report is for an untuned system).




Yes, I've had one such crash.

The machine has 4GB of RAM and initially I set it up with vm.kmem_size and vm.kmem_size_max set to 1024M. It's my home fileserver and I'm the only regular user. After booting the box I had tested the transfer speed back and forth over the net and after that not really used it any more that day. The next day I discovered that it had crashed sometime during the night. I've since changed the two tuneables above to 1536M and I've not had any crashes since. I also tried with 2048M but that only resulted in a crash upon boot.

Kind regards

Morten Strårup


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