data coming very late from DB and sometimes timing out

RE: data coming very late from DB and sometimes timing out

gauravp0004 — Tue, 27 Oct 2020 03:38:49 GMT

Thank you all for response. Came to know that Appian cloud database as have very less resources as compare to PROD . we were using cloud database so was not sure on resources part.

RE: data coming very late from DB and sometimes timing out

Praful Singhal — Mon, 26 Oct 2020 13:14:38 GMT

As Appian is written in java so it has 2 objects, 1 controller, and 1 service class to map database object to the Appian CDT object.

Data Transformation Object

Data Acces Object

Which are mapped using a transformation service class. So basically it's a web API(with paginated) call which we are under presumption its a database call. Whenever there is a probability of a huge data set, I would recommend a stored procedure with pagination. I am sooner going to blog about this with the detailed performance of Appian database connections. I have already written one article on this aspect "https://www.linkedin.com/pulse/microservices-vs-appianbuild-microservice-praful-singhal/?trackingId=Ig3w6S0pSvi0arXGOMWgBw%3D%3D". I am now planning to deep dive into it with my next article coming on this weekend, hope my next article will help you understand the root cause and take you in the right step in direction of store procedures.

RE: data coming very late from DB and sometimes timing out

Scott Milton — Fri, 23 Oct 2020 20:32:34 GMT

Are these appian cloud databases?
Although the data is the same on the table, are the indexes on the table the same as well? Sometimes indexes are added in one environment manually but not the others.

RE: data coming very late from DB and sometimes timing out

gauravp0004 — Wed, 21 Oct 2020 16:49:18 GMT

Thank you . Will take a look . but still trying to find a reason when data is same why working on prod and not on test. One more pointer in cloud database on test view is taking time to load data and when sorting on id it is taking more than 13 seconds, on prod less then 1 second.

RE: data coming very late from DB and sometimes timing out

ChristineLHutchison — Wed, 21 Oct 2020 16:41:07 GMT

Some thoughts that might be worth looking into
1. Run explain plan on your view. Is it doing any full table scans that can be removed
2. Is the ID field a PK or a field that has an index
3. Since it looks like you are trying to convert the resulting set to integer in Appian, can you change the view to have that column as an integer and remove the tointeger