Hi Dave, On Thu, Sep 25, 2025 at 7:55 PM Dave Page <[email protected]> wrote:
> > > On Thu, 25 Sept 2025 at 14:44, Aditya Toshniwal < > [email protected]> wrote: > >> Hi Dave, >> >>> >>> If pgAdmin were a single-user application, I'd agree - however it is not >>> when running in server mode. Other users will not know what is going on if >>> one user exhausts memory. >>> >> How about allowing multi result sets only for desktop app? >> > > I *really* dislike that. We should support all features in both modes, > except where it clearly doesn't make sense. > > >> The problem with memory limits is - it's an extra overhead to keep >> checking how much memory is consumed. A row size will depend on the number >> of columns and data. If we have a predefined algorithm which will decide >> the limits in a performant way is desirable. >> > > Well we can take the extra cycles to compute actual memory usage, or we > can just pick an arbitrary number of rows (which as you note, will depend > on the schema and data). The former is clearly easier to tune - it could be > an arbitrary limit in the config, or it could be computed based on machine > resources and utilisation, whilst the latter is always going to be a guess. > I'm not sure I see another way. Anyone else? > For the first approach - python provides a function which we can use. But deciding the limit is something tricky. A user may still get out of memory error with a limit set. It will all depend on what is running on his system. Setting the limit itself is like playing a video game. For the row count based limit, we already have a per page limit - and adding more such configs will only add more confusion. import sys my_tuple = (1, 2, 'hello', 4.5) memory_size = sys.getsizeof(my_tuple) print(f"The memory size of the tuple is: {memory_size} bytes") > -- > Dave Page > pgAdmin: https://www.pgadmin.org > PostgreSQL: https://www.postgresql.org > pgEdge: https://www.pgedge.com > > -- Thanks, Aditya Toshniwal pgAdmin Hacker | Sr. Staff SDE II | *enterprisedb.com* <https://www.enterprisedb.com/> "Don't Complain about Heat, Plant a TREE"
