 Hi everyone, my name is Sveta Smirnova and I work as MySchool support engineer for more than 12 years. I started in MySchool AB and then this company was acquired and currently I work for Percona. And I'm here to answer your questions and let's see what I have now. First, this question is in your talk, you show it dozens of options which improve MySchool performance. Does this mean DBA position is dead and everyone can perfectly tune MySchool performance? Well, the answer is yes or no. Sorry, I don't see my... I'm sorry, I'm talking with our host Cassandra because for some reason I don't see myself. Anyway, let's back to the question. It's actually answer is yes or no and MySchool DBA position is certainly is not dead because MySchool is complicated software and you need to perfectly tune it, you need to understand how it works. But at the same time in my talk, I showed this options which could solve like kind of 80% of performance issues. And this is actually like the first thing which we in support try to check if our customers report performance issues. But this kind of 80% which could be solved by tuning these options, unfortunately that's not all options which can cause to MySchool slow down. And of course MySchool DBA position is still will be alive. Okay, so I see do not see more questions and do we have other questions? Another question is what are perspectives of the automatic database configuration? For example, configuration by made by the server itself without human intervention. MySchool word it's we have like for I think one sunset started in Percon in 2015 and on Percon Alive I saw many like irregularly I saw Percon Alive as yearly conferences about which my employer provides about databases. And on these conferences we regularly saw talk from various companies or even institutions, universities, who try to perform automatic MySchool configuration. Last year I also saw it's Oracle open world that's conference which Oracle company provides and also has MySchool part of it because Oracle now owns MySchool was product. They presented its own software working in cloud about which allows to configure MySchool automatically. So this is certainly it's growing market for it, but at the same time which methods which such solution use is like learning. So like they take life database or we try to that software tries to change options, tries to change options, it tries to measure how effective is it. And while test shows perfect results like having some benchmarks which run which run the first let's initially started us like default option started to run slow and then it starts to perform very fast. It's still it's not I think it's not something which you want to see on production like for example if you are having trouble, you are having trouble you want to resolve it quickly and this is why knowledge of experienced people come soon. But at the same time, certainly this approach works, and probably since some few iteration that we will have working solution when server can tune itself. At the same time, I can also say that MySchool supports for years automatic configuration like for example in a DB storage engine can use its own algorithms to decide when to flush, flush pages from the buffer pool when it decides that server is idle and it can perform small background work and then server is active it tries to perform less background work. So that's that's happens with growing what's going on but this is not built it's I think it's something which which could be done better in future. Our question is, can you tell how you got involved with working in open source. Well, actually that's I started my it career as a web developer and as a developer I tried to use working working with open source products, just because I like it. And probably that's because that's how it started my it career in the beginning of this beginning of millennium of 2000 years and that's was most democratic options which available for most of my customers. And when I work it on open source projects I got them for free I got a source code I could modify it I could read like I'm having even if I didn't modify I found like it's working thought as I expected I could read the source. I could read use bug databases, and I could implement work around basic on the mic knowledge. And then I once said I started to working about like how can I return how you can return back. And sites like open source projects which is also PHP programming languages, my school and post address build databases. That's it's not that it's written in C and C++ and that's not like my expertise I tried to contribute to PHP documentation I tried to contribute to form to share knowledge and this way it's how I was involved. And my friend then asked me to join my school support team and I joined my school support team and started to work in open source professionally. Thank you. More questions on which platforms my school shows better performance. My school. It's, well, it's a hard question speaking about like how they'll I work it in like in my school and working out in Percona and supporting new platform even if it's Linux. It's a little bit challenging because like different versions of Linux have special like something special libraries like something something which can cannot work cannot cannot work perfectly like on other platforms. And it's like if you go to download page for my school and Percona service, you will see just like a limited number of platforms. And I would say this now platforms where performance teams on this companies they put their effort to to tune my school software software better. Speaking about which exactly platforms which is the best it's I would say go to Percona site because we support like Debian and Red Hat, like Debian Ubuntu and Red Hat, CentOS, Fedora, version of Linux and the test test my school on these platforms Oracle supports more platforms and MariaDB also supports more platforms. But I can say like for the most focus and most user base and most shops to use that's either Red Hat or Debian kind of Linux. For other flavors of Linux my school should work and should work perfectly but you may see some issues when you compile my school on these platforms. Thank you. Okay, now we have more questions or I'm done. Okay, thank you very much I will be around on the on the chat and if you have more questions, you can ask me feel free to ask me feel free to ping me at the end of my presentation I also put link to my Twitter account I also feel free to write me on Twitter and ask any questions you like. It's, I have one more question is what has been the best piece of advice you have ever received. Oh, that's tough questions it's hard to answer without preparing. I will it's actually I would say I would say maybe it's like not the best but it's speaking like about my school performance is the best piece of advice which I heard lately about my school performance is from Dimitris Kravchuk he is a performance architect at my school to rhetorical and he test all new versions of my school for better performance. He uses complicated and standard test sets and finds like when code was wrong, but still he says that's best benchmark is your production. And I believe that's it is actually that's what just I'm telling my customers all the time we hit the performance issue because like it's really deep. It's on the load. What's the consulter your greatest success in your career. Well, it's probably it's the fact which I joined my school support team and I'm still here and why success it's because will I sometimes to try to do something different because I get bored and it's the same time like just like maybe I will need just one hour. Some customer comes in and asks me questions, which I just cannot answer and I have to learn something new. So that's why it's really fun and challenging work. What do you love about working in open source. It's I live a life. It's actually I like the fact that we open source. It's few things. First like we are giving something which like we are doing our work better we are doing something good and giving that's a way for free. It's also I like that we can share knowledge we can learn anything like like we can we can take a source code we can read it we can read find understand why it doesn't work as as we expect or why does it like work so beautifully if you can find that's works perfect and it's again like it's I started my work in open source not as the open source like a developer or support engineer but as open source user and it was very convenient because like when you work with closed source and that's something that's works not as you expect you cannot do anything before open source you can just change it you can understand it you can submit a bug report you can contribute you have many many many options how to make it's software to work better for you. Thank you very much. It was a pleasure to talk and open source summit and thank you very much for inviting me. Thank you.