Memory alloc exception

On 6/15/21 6:09 AM, paul.malm@lfv.se wrote:

Hi list,

I get this error when running a SQL statement in my Java application.

ERROR: Invalid memory alloc request size 1683636507

Location: File:
d:\pginstaller.auto\postgres.windows-x64\src\backend\utils\mmgr\mcxt.c,
Routine: MemoryContextAlloc, Line: 779

Server SQLState: XX000

Is Postgresql running on Windows?

What version?

I think it has something with to do with PostgreSQL

This is how I had my postgrsql.conf:

shared_buffers = 128MB

#huge_pages = try

#temp_buffers = 8MB

#max_prepared_transactions = 0

#work_mem = 6MB

work_mem = 64MB

#maintenance_work_mem = 64MB

maintenance_work_mem =  64MB

Then I changed to this postgrsql.conf:

shared_buffers = 4096MB <<<<<<<,

#huge_pages = try

#temp_buffers = 8MB

#max_prepared_transactions = 0

#work_mem = 6MB

work_mem = 256MB   <<<<<<<

#maintenance_work_mem = 64MB

maintenance_work_mem =  256MB <<<<<<

And got this error instead:

Org.postgresql.util.PSQLException: AnI/O error occurred while sending to
the backend.

Failing hardware?

--
Angular momentum makes the world go 'round.

<paul.malm@lfv.se> writes:

I get this error when running a SQL statement in my Java application.
ERROR: Invalid memory alloc request size 1683636507

This is a pretty common symptom of corrupt data (specifically, that the
length word of a variable-length field is garbage). More than that
can't be said with the info you've provided. But I'd be thinking about
"how do I clean up the corruption and prevent a recurrence", not
"I need to increase memory settings".

regards, tom lane