#!/usr/sbin/dtrace -qs
#pragma D option strsize=8192
pid$3::*mysql_parse*:entry
{
self->a=1;
self->query=copyinstr(arg1);
self->count=0;
}
pid$3::*mysql_parse*:return
/ self->a && self->count > $2 /
{
printf(\"### write() count: %d ###\\n%s\\n\\n\", self->count, self->query);
self->a=0;
self->query=0;
}
pid$3::*mysql_parse*:return
/ self->a /
{
self->a=0;
self->query=0;
}
syscall::*write*:entry
/ self->a /
{
self->count++;
}
tick-$1
{
exit(0);
}
Wednesday, April 14, 2010
Which sql query you think is the worst for disks ...
Based on milek.blogspot.com
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