Re: [HACKERS] HEAD crashes on windows when doing VACUUM ANALYZE
Matthias wrote: when running VACUUM ANALYZE on my database built on win32-x86 from yesterday's git checkout I always get this at some point during VACUUM ANALYZE: LOG: server process (PID 5880) was terminated by exception 0xC094 DETAIL: Failed process was running: VACUUM VERBOSE ANALYZE HINT: See C include file ntstatus.h for a description of the hexadecimal value. LOG: terminating any other active server processes I am not sure if it's useful to report it here, but I thought I'd do it anyway :) That seems to be STATUS_INTEGER_DIVIDE_BY_ZERO. Does it only happen with a certain table? Are you sure there is no data corruption? A stack trace would help: http://wiki.postgresql.org/wiki/Getting_a_stack_trace_of_a_running_Postg reSQL_backend_on_Windows Yours, Laurenz Albe -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] HEAD crashes on windows when doing VACUUM ANALYZE
On Thursday, August 30, 2012 06:50:13 PM Matthias wrote: 2012/8/30 Albe Laurenz laurenz.a...@wien.gv.at: Matthias wrote: when running VACUUM ANALYZE on my database built on win32-x86 from yesterday's git checkout I always get this at some point during VACUUM ANALYZE: LOG: server process (PID 5880) was terminated by exception 0xC094 DETAIL: Failed process was running: VACUUM VERBOSE ANALYZE HINT: See C include file ntstatus.h for a description of the hexadecimal value. LOG: terminating any other active server processes I am not sure if it's useful to report it here, but I thought I'd do it anyway :) That seems to be STATUS_INTEGER_DIVIDE_BY_ZERO. Does it only happen with a certain table? Are you sure there is no data corruption? A stack trace would help: http://wiki.postgresql.org/wiki/Getting_a_stack_trace_of_a_running_Postg reSQL_backend_on_Windows Attached the debugger. It crashes in rangetypes_typeanalyze.c at line 186: delta = (non_empty_cnt - 1) / (num_hist - 1); According to the debugger num_hist = 1, so it divides by zero. Its curious though that the SIGFPE isn't properly cought though. That would only lead to a different error, but ... Postgres does install a handler for it. What happens if you run SELECT -2147483648/-1;? Greetings, Andres -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] HEAD crashes on windows when doing VACUUM ANALYZE
2012/8/30 Albe Laurenz laurenz.a...@wien.gv.at: Matthias wrote: when running VACUUM ANALYZE on my database built on win32-x86 from yesterday's git checkout I always get this at some point during VACUUM ANALYZE: LOG: server process (PID 5880) was terminated by exception 0xC094 DETAIL: Failed process was running: VACUUM VERBOSE ANALYZE HINT: See C include file ntstatus.h for a description of the hexadecimal value. LOG: terminating any other active server processes I am not sure if it's useful to report it here, but I thought I'd do it anyway :) That seems to be STATUS_INTEGER_DIVIDE_BY_ZERO. Does it only happen with a certain table? Are you sure there is no data corruption? A stack trace would help: http://wiki.postgresql.org/wiki/Getting_a_stack_trace_of_a_running_Postg reSQL_backend_on_Windows Attached the debugger. It crashes in rangetypes_typeanalyze.c at line 186: delta = (non_empty_cnt - 1) / (num_hist - 1); According to the debugger num_hist = 1, so it divides by zero. I guess this is due to the new statistics collection for range types? -Matthias -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] HEAD crashes on windows when doing VACUUM ANALYZE
On 30.08.2012 19:50, Matthias wrote: It crashes in rangetypes_typeanalyze.c at line 186: delta = (non_empty_cnt - 1) / (num_hist - 1); According to the debugger num_hist = 1, so it divides by zero. I guess this is due to the new statistics collection for range types? Yep. Fixed, thanks for the report! I added just a check that the histogram is not created if there are less than 2 values in the sample. The corresponding code for scalars also checks that there are more than 1 distinct value, so that the histogram doesn't consist of all duplicates. We don't currently count the number of distinct values for ranges, so that would require a bit more work, but I don't think it makes much difference in practice. - Heikki -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
Re: [HACKERS] HEAD crashes on windows when doing VACUUM ANALYZE
Andres Freund and...@2ndquadrant.com writes: On Thursday, August 30, 2012 06:50:13 PM Matthias wrote: According to the debugger num_hist = 1, so it divides by zero. Its curious though that the SIGFPE isn't properly cought though. That would only lead to a different error, but ... Not all platforms think an integer divide-by-zero maps to SIGFPE. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
[HACKERS] HEAD crashes on windows when doing VACUUM ANALYZE
Hello, when running VACUUM ANALYZE on my database built on win32-x86 from yesterday's git checkout I always get this at some point during VACUUM ANALYZE: LOG: server process (PID 5880) was terminated by exception 0xC094 DETAIL: Failed process was running: VACUUM VERBOSE ANALYZE HINT: See C include file ntstatus.h for a description of the hexadecimal value. LOG: terminating any other active server processes I am not sure if it's useful to report it here, but I thought I'd do it anyway :) -Matthias -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
