Thread killing logic

[Eric Bergen]

I was reading through the flipper code and found this:

if (defined $rhh_processlist->{$thread_id}->{Info}
&& $rhh_processlist->{$thread_id}->{Info} =~ /^\s*(\/\*.*?\*
\/)?\s*(INSERT|UPDATE|DELETE|REPLACE|CREATE|DROP|ALTER|REPAIR|OPTIMIZE|
ANALYZE|CHECK)/si) {

What's the purpose of making sure a thread is running a query before
killing it instead of just killing everything except the current
connections thread and the system users?

-Eric

[Jeremy Cole]

All,

Even though Eric already has an answer via IM, for the sake of the
mailing list, I'll reply here as well:

The code below is actually checking which queries to *skip* killing,
giving them up to 10 seconds ($max_delay) to die before finally
killing them anyway. The hope is to allow the failover process to be
a bit more "nice" to potentially dangerous-to-kill queries.

Regards,

Jeremy

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