Strange mysqld strace .....

Hello!

We installed mysql-server 4.012 in a redhat 7.2 with innodb support and
we find this in strace... look at sched_setscheduler line

#strace -p 15394

time(NULL) = 1050329738
write(57, "2\0\0\1\0\0\0.\0\0\1\0\1\0\2\0(Rows matched: 1"..., 57) = 57
sched_setscheduler(0x3c22, 0, 0xba3ff8a0) = -1 EINVAL (Invalid argument)
time([1050329738]) = 1050329738


#cd /proc/15394/fd
#ls -la 57

57 -> socket:[94368503]

#netstat -na | grep 94368503

unix 3 [ ] STREAM CONNECTED 94368503
/tmp/mysql.sock

You think this is a normal behavior???????? Or we need some special
utilities/Libraries/Kernel patch/options????


Thanks!!!!!!!!



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Re: Strange mysqld strace .....

Eduard Barrera Casas writes:
>
>
> Hello!
>
> We installed mysql-server 4.012 in a redhat 7.2 with innodb support and
> we find this in strace... look at sched_setscheduler line
>
> #strace -p 15394
>
> time(NULL) = 1050329738
> write(57, "2\0\0\1\0\0\0.\0\0\1\0\1\0\2\0(Rows matched: 1"..., 57) = 57
> sched_setscheduler(0x3c22, 0, 0xba3ff8a0) = -1 EINVAL (Invalid argument)
> time([1050329738]) = 1050329738
>

Yes, this is interesting output.

But this list requires fully repeatable test cases. Can you give us
instructions how to always come to the above output ???

Also, let us know if you are using our binary, because if not, we
would recommend you to do so.

Also which version and make of kernel are you using ??

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