04.10.2019 15:50, Mark Rotteveel wrote: > The problem is inherent to the monitoring tables. If you query one > monitoring table, Firebird needs to collect and prepare a snapshot of > the data for all other monitoring tables to be able to provide a stable > and consistent view of the monitoring tables in your current > transaction. If you do this a lot, then it will need to repeatedly spend > that time, which can have an impact on performance, because the cost of > that data collection is non-zero (. > > So, the problem can't really be fixed, because that data collection will > need to happen and doing the collection takes time (CPU) and memory.
Just an addition: In v2.5, pending MON$ requests could also [temporarily] block other connections' operations, thus decreasing the overall performance. This was improved in v3 to reduce the cross-locking with other connections. But generally, your message is absolutely correct. Dmitry ------------------------------------ ------------------------------------ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Visit http://www.firebirdsql.org and click the Documentation item on the main (top) menu. Try FAQ and other links from the left-side menu there. Also search the knowledgebases at http://www.ibphoenix.com/resources/documents/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/firebird-support/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/firebird-support/join (Yahoo! ID required) <*> To change settings via email: firebird-support-dig...@yahoogroups.com firebird-support-fullfeatu...@yahoogroups.com <*> To unsubscribe from this group, send an email to: firebird-support-unsubscr...@yahoogroups.com <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/
