FreeBSD 6 Hard Lock no logs

[Rob Connon (Info)]

HI,

The system completly locks up, attached keyboard is useless.. and as 
mentioned no errors.. the only pattern is tuesday/wednesday it freezes.. 
other days of the week it's fine under heavy load..
buildworlds are not a problem..

Rob.

Lowell Gilbert wrote:

>"Rob Connon (Info)" <rob.info at vfs.com> writes:
>
>  
>
>>Hi,
>>
>>I have a web/mail server thats running the lastest version of FreeBSD
>>6.0-RELEASE-p9 #4. In the last month or so it's started hard locking..
>>when the machine locks up i can still ping it and get connects from
>>telneting to 80,22,etc sometimes i get a banner and sometimes i
>>dont.. but there are
>>no errors on the console or in the logs.
>>
>>The odd thing is the locking seems to happen within a certain time
>>window (mon,tues) and never end of the week or weekend.. i suspected
>>it could have been
>>a bad cron job but nothing falls into that time frame.
>>
>>As a test i've been rebooting the server everynight to see if that
>>would help the machine get past the begining of the week with out a
>>hang and again this morning
>>even though i rebooted last night at 10pm hung around 9:47am.
>>
>>The machine is a Dell PowerEdge 2550, I've had dell come and replace
>>the MB and have ran all their diagnostics aswell with no errors
>>reported..
>>I've been reading alot about APIC and ACPI and people having similar
>>issues but nothing that fits the bill... below is the dmesg and output
>>of vmstat -i.. another odd thing is the rate for the CPU timer is
>>extremely high compared to other machines with similar hardware or
>>faster hardware.
>>
>>Any help on where to look next would be awesome.
>>    
>>
>
>Try a debugging kernel and see if you can break to the debugger after
>the freeze.  If so, youcan look at task states.
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>  
>

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