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Showing posts from April, 2009

Tizra gets faster

Non-technical summary: things are lots faster at Tizra sites and admin tools. There's certainly more to do, but we've got more tricks up our sleeves! Because the big current speed boost is related to one cause, and it took me a while to track down, the geek appendage to this post describes what we found and how we fixed it.Geekly detailsI spent a bunch of time last week looking at system performance. As we've been adding customers and usage, we were beginning to feel the pinch. Performance always varies, but the range of response times was getting wider as things slowed, leading me to think that there might be some systemic issues that would give us a quick improvement (and indeed there was some Linux tuning that helped a bit). But data access seemed to be the real issue, so I spent a bunch of time looking into hibernate, and our caching and querying, and then wound up spending a day or so basically watching all the queries go through Postgres. And you know what? most of …