Valerii Kravchuk

Doing micromanagement of MySQL bugs processing since 2012, for free

[MariaDB Foundation @mariadb_org]

Database changes should be SCARY - https://t.co/Hm2u3gOvU7

[Valerii Kravchuk @mysqlbugs]

@PeterZaitsev Thank you!

[Valerii Kravchuk @mysqlbugs]

@MarkCallaghanDB No, but once I use lab. version of pt-pmp based on qiuckstack instead of gdb

[Valerii Kravchuk @mysqlbugs]

Had you ever tried to make some sense out of the full backtrace for 1000+ threads in the mysqld process? Try this lame approach first:

https://t.co/kn7ilPNeg2

[Valerii Kravchuk @mysqlbugs]

@MySQL #bugoftheday today is https://t.co/uurhWApMUR, because concurrency matters.

[Valerii Kravchuk @mysqlbugs]

@MySQL #bugoftheday today is https://t.co/VFNYeJU8Ep, because consistency matters for new optimizer features.

[Valerii Kravchuk @mysqlbugs]

@MySQL #bugoftheday today is https://t.co/QcAQCLAhZx, because minor version upgrades should work without crashes.

[Valerii Kravchuk @mysqlbugs]

That's all I have to share right now:

https://t.co/0gojYqgWkW

[Valerii Kravchuk @mysqlbugs]

@MySQL #bugoftheday today is https://t.co/bOT8G9N912, because incompatible changes should be documented if introduced

[Valerii Kravchuk @mysqlbugs]

Slides from my #FOSDEM #MySQL devroom talk on different kinds of flame graphs:

https://t.co/YmlnMCYHwr

[Valerii Kravchuk @mysqlbugs]

Slides from my recently completed talk on some less trivial usage of #bpftrace:

https://t.co/9UZVyb65lo

[Valerii Kravchuk @mysqlbugs]

My first #FOSDEM 2022 talk on #MariaDB, @macOS and #dtrace is over. Slides are also here:

https://t.co/KIn5Kx6YMS

[Valerii Kravchuk @mysqlbugs]

#bpftrace, #perf and #gdb work well together to solve more complex dynamic tracing problems:

https://t.co/h2sXODtmFG

more about this during my #FOSDEM 2022 MariaDB Devroom session tomorrow!

[Valerii Kravchuk @mysqlbugs]

@MySQL #bugoftheday today is https://t.co/JbBRhTTv3h.

[Valerii Kravchuk @mysqlbugs]

@MySQL #bugoftheday today is https://t.co/Xq1T8dkeYz, because wrong results matter

[Valerii Kravchuk @mysqlbugs]

@MySQL #bugoftheday today is https://t.co/jmcyOm0ifQ, because even the best, new and useful features should be correctly documented.

[Valerii Kravchuk @mysqlbugs]

#dtrace, #MariaDB and #macOS - one of the winning combinations for #FOSDEM 2022:

https://t.co/AXl4ZuTdVs

[Valerii Kravchuk @mysqlbugs]

Big numbers bring fun. @MySQL #bugoftheday, https://t.co/owJhNOF0Qz, demonstrates yet another example of this fun.

[Valerii Kravchuk @mysqlbugs]

Pushing #bpftrace to the limits, adding probes into every other line of the #MariaDB server code, accessing local variables and members of deeply nested structures passed as arguments... See you at #DOSDEM:

https://t.co/MotMn9HKfv

[Valerii Kravchuk @mysqlbugs]

@MySQL #bugotheday today is https://t.co/dd7Zi6LgTM, funny one