Brandon Johnson
Here at Mozilla we like to keep our database systems secure and no more open than they need to be. Like many database systems, privileged users are locked down to socket only connections. This can be a problem if you … Continue reading
Sheeri
One of the chassis in the PHX1 datacenter was experiencing issues which took many services, including those on the generic web cluster offline and degraded others for approximately half an hour. Fixing the issue took approximately 15 minutes. Services should … Continue reading
Sheeri
We have been experiencing intermittent Bugzilla slowness since Wednesday, June 12th 2013 at 5 pm UTC (10 am US/Pacific time). We have been working throughout the weekend to pinpoint the cause of this irregular, but noticeable, issue. The problem is … Continue reading
Sheeri
I do not recall seeing an announcement about it, but I went looking for the videos today and lo and behold, they were up! Forgive me if I missed a post about it….but if you also missed it, here they … Continue reading
Sheeri
Back in November, I filed MySQL bug 67448, talking about a different type of max_allowed_packet problem. See, an application had put data into the database, but could not retrieve it without getting max_allowed_packet. With the help of some really smart … Continue reading
Sheeri
After upgrading to Percona’s patched MySQL 5.1*, end users were having connectivity problems, and reporting errors such as: OperationalError: (2003, “Can’t connect to MySQL server on ‘db-amo-ro’ (110)”) TimeoutError: Request timed out after 5.000000 seconds OperationalError: (1135, “Can’t create a … Continue reading
Sheeri
A while ago (November 2012 to be exact), we upgraded the support.mozilla.org databases from Percona 5.1 to MariaDB 5.5 (the next step, happening soon, is upgrading them to Oracle’s MySQL 5.6). One of the engineers and I had a conversation … Continue reading
Sheeri
The May Boston MySQL User Group featured John Hugg of VoltDB talking about determinism and databases. I have uploaded the hour-long video to http://www.youtube.com/watch?v=mTDLyRauJtw. Seasoned MySQLers will nod their heads because the problems described are familiar, and those who are … Continue reading
mrz
On May 15 at 1800 PDT Nagios alerted the start of sporadic DNS resolution failures. This post summarizes the events, the impact and specific steps Mozilla IT is taking to avoid future disruptions of this nature. This post is intended … Continue reading
mrz
From the May 6 weekly Project Meeting: Sometimes Mozilla IT shows a different side and brings Mozilla to the classroom.