Обсуждение: strange segfault with 8.3.8
hello,
from kernel log:
Dec 7 07:24:45 nsXXXXXX kernel: postgres[22481]: segfault at 7fda5e1d5000 ip 00007fda604553c3 sp 00007fffe41faf28 error 4 in libc-2.9.so[7fda603d1000+168000]
from kernel log:
Dec 7 07:24:45 nsXXXXXX kernel: postgres[22481]: segfault at 7fda5e1d5000 ip 00007fda604553c3 sp 00007fffe41faf28 error 4 in libc-2.9.so[7fda603d1000+168000]
Dec 7 07:24:45 nsXXXXXX kernel: grsec: From XX.YY.ZZ.51: Segmentation fault occurred at 00007fda5e1d5000 in /usr/lib/postgresql/8.3/bin/postgres[postgres:22481] uid/euid:103/103 gid/egid:114/114, parent /usr/lib/postgresql/8.3/bin/postgres[postgres:29857] uid/euid:103/103 gid/egid:114/114
This is on 8.3.8, latest Ubuntu distribution, server under quite heavy load.
afterwards we had some corrupted pages ("ERROR: compressed data is corrupt").
any clues / directions welcome.
-- This is on 8.3.8, latest Ubuntu distribution, server under quite heavy load.
afterwards we had some corrupted pages ("ERROR: compressed data is corrupt").
any clues / directions welcome.
Filip Rembiałkowski
JID,mailto:filip.rembialkowski@gmail.com
http://filip.rembialkowski.net/
Filip Rembiałkowski wrote:
Random segfaults only under heavy load with corrupted pages afterwards normally means bad RAM. I'd suggest a round of memtest86+ on the system if it's PC hardware.Dec 7 07:24:45 nsXXXXXX kernel: postgres[22481]: segfault at 7fda5e1d5000 ip 00007fda604553c3 sp 00007fffe41faf28 error 4 in libc-2.9.so[7fda603d1000+168000]Dec 7 07:24:45 nsXXXXXX kernel: grsec: From XX.YY.ZZ.51: Segmentation fault occurred at 00007fda5e1d5000 in /usr/lib/postgresql/8.3/bin/postgres[postgres:22481] uid/euid:103/103 gid/egid:114/114, parent /usr/lib/postgresql/8.3/bin/postgres[postgres:29857] uid/euid:103/103 gid/egid:114/114
This is on 8.3.8, latest Ubuntu distribution, server under quite heavy load.
afterwards we had some corrupted pages ("ERROR: compressed data is corrupt").
-- Greg Smith 2ndQuadrant Baltimore, MD PostgreSQL Training, Services and Support greg@2ndQuadrant.com www.2ndQuadrant.com
W dniu 7 grudnia 2009 17:43 użytkownik Greg Smith <greg@2ndquadrant.com> napisał:
Just a note for all other who may encouter this problem:
This was not a vanilla Ubuntu - this was vendor-modified version, witch custom grsecurity patched kernel and probably with custom patched libc.
# uname -a
Linux nsXXXXXX.ovh.net 2.6.31.5-grsec-xxxx-grs-ipv4-64 #2 SMP Thu Nov 5 12:36:20 UTC 2009 x86_64 GNU/Linux
Filip Rembiałkowski wrote:Random segfaults only under heavy load with corrupted pages afterwards normally means bad RAM. I'd suggest a round of memtest86+ on the system if it's PC hardware.Dec 7 07:24:45 nsXXXXXX kernel: postgres[22481]: segfault at 7fda5e1d5000 ip 00007fda604553c3 sp 00007fffe41faf28 error 4 in libc-2.9.so[7fda603d1000+168000]Dec 7 07:24:45 nsXXXXXX kernel: grsec: From XX.YY.ZZ.51: Segmentation fault occurred at 00007fda5e1d5000 in /usr/lib/postgresql/8.3/bin/postgres[postgres:22481] uid/euid:103/103 gid/egid:114/114, parent /usr/lib/postgresql/8.3/bin/postgres[postgres:29857] uid/euid:103/103 gid/egid:114/114
This is on 8.3.8, latest Ubuntu distribution, server under quite heavy load.
afterwards we had some corrupted pages ("ERROR: compressed data is corrupt").
Just a note for all other who may encouter this problem:
This was not a vanilla Ubuntu - this was vendor-modified version, witch custom grsecurity patched kernel and probably with custom patched libc.
# uname -a
Linux nsXXXXXX.ovh.net 2.6.31.5-grsec-xxxx-grs-ipv4-64 #2 SMP Thu Nov 5 12:36:20 UTC 2009 x86_64 GNU/Linux
--
Filip Rembiałkowski
JID,mailto:filip.rembialkowski@gmail.com
http://filip.rembialkowski.net/