El día domingo, septiembre 18, 2022 a las 07:47:32a. m. -0700, Adrian Klaver escribió: > On 9/18/22 02:30, Matthias Apitz wrote: > > El día jueves, septiembre 15, 2022 a las 08:40:24a. m. -0700, Adrian Klaver escribió: > > > > > On 9/14/22 22:33, Matthias Apitz wrote: > > > > El día miércoles, septiembre 14, 2022 a las 07:19:31a. m. -0700, Adrian Klaver escribió: > > > > > > > > > On 9/14/22 01:31, Matthias Apitz wrote: > > > > > > > The 'app-server' does not answer, but does the database not answer also? > > > > > > Have you looked to see if the database is providing a response in a timely > > > manner and if it is getting 'lost' in the 'app-server'? > > > > I do not "think" that the time is spent elsewhere in the 'app-server'. > > to make a fact of the "thinking", I enabled the tracing of our dblayer > > showing how many milliseconds have been spent between entering the dblayer and > > returning the result to the application layers. This is in effect since > > 36 hours now. Since September 13 the problem has not showed up anymore. > > We are waiting for it... > > Is this with or without your every 10 sec 'ping' search program? The 'ping' search was stopped on September 16, 7:45 CEST. The 'ping' search never showed the problem. > > > Also have you considered Tom Lane's suggestion of using auto_explain? > > > > I'm afraid that this would affect all other applications using the same > > server. We still have other options to use. When the above tracing shows > > a result, i.e. which of the high level operations of the dblayer uses > > more time (more milliseconds) than normal, the next level is the detailed logging > > of the ESQL/C operations (where we added time stamps which normaly this > > logging does not have in its source code). > > You can load auto_explain per session as shown here: Every connect from the ILL forks a new 'app-server' session which creates a new ESQL/C session, and all this occur randomly when the ILL wants to search for a book title if this is available in that library. In short: no way. Thanks matthias -- Matthias Apitz, ✉ guru@xxxxxxxxxxx, http://www.unixarea.de/ +49-176-38902045 Public GnuPG key: http://www.unixarea.de/key.pub Sahra Wagenknecht im Bundestag: "Aber die Vorstellung, dass wir Putin dadurch bestrafen, dass wir Millionen Familien in Deutschland in die Armut stürzen und dass wir unsere Industrie zerstören, während Gasprom Rekordgewinne macht – ja, wie bescheuert ist das denn?" Recht hat sie!
