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d6tstack.utils seems to leak database connections #34

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cardin opened this issue Jan 13, 2023 · 0 comments
Open

d6tstack.utils seems to leak database connections #34

cardin opened this issue Jan 13, 2023 · 0 comments

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@cardin
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cardin commented Jan 13, 2023 •
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I have a 200million row dataframe that I've sliced in-memory into chunks of 200,000 to insert gradually.

After running d6tstack.utils.pd_to_psql for 30 minutes or so (which is the halfway mark), I will get the following error:

sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) connection to server at "...", port ... failed: FATAL: sorry, too many clients already

I added the following lines to d6tstack.utils.py and the error stopped reproducing:

sql_cnxn.close()
sql_engine.dispose()
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@cardin