---------- Forwarded message ---------- From: Andrew Garrett <agarr...@wikimedia.org> Date: 2009/11/16 Subject: [Wikitech-l] Downtime this morning To: Wikimedia developers <wikitec...@lists.wikimedia.org>
Hi all, There has been some downtime this morning (about 15 minutes) due to a software update. I pushed a software update, and immediately servers started crashing according to nagios. Looking at ganglia, it looks like the issue was the familiar issue where scap pushes a few 4-CPU apaches into swap, which then crash and come back a few minutes later. This time, however, obviously a key memcached node fell over, causing a database overload, resulting in the site being mostly inaccessible for about ten minutes. I prepared to revert the software update, but determined that the problem was not the software update, and a scap would exacerbate the issue. The problem resolved itself spontaneously. We need to fix things up so the scap script is less liable to push machines into swap :) -- Andrew Garrett agarr...@wikimedia.org http://werdn.us/ _______________________________________________ Wikitech-l mailing list wikitec...@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikitech-l _______________________________________________ WikiEN-l mailing list WikiEN-l@lists.wikimedia.org To unsubscribe from this mailing list, visit: https://lists.wikimedia.org/mailman/listinfo/wikien-l
