cyberdem0n / bg_mon Goto Github PK
View Code? Open in Web Editor NEWBackground worker for monitoring PostgreSQL
License: MIT License
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a1exsh 40a erthalion docdocker sdudoladov rafiasabih zhuomingliang zalando-pg voiceainfraeng venumadhavvennu 4amgln4bg_mon's Issues
I would like to be able to install this extension through pgxn.org
The pgxn.org repository provides an installation utility called pgxnclient for installing PostgreSQL extensions. This is much simpler than the make;make install for several platforms.
Memory usage is off in recent version
The cgroup.memory.usage key is off.
New
Old
Cmdline can contain double quotes what breaks json
Example:
"query": "standby 10.2.76.25(45778) sending backup "pg_basebackup base backup""
error during bg_mon build for PostgreSQL 15
error during bg_mon build for PostgreSQL 15 (beta 3)
Cloning into 'bg_mon'...
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels -Wmissing-format-attribute -Wimplicit-fallthrough=3 -Wcast-function-type -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -Wno-format-truncation -Wno-stringop-truncation -g -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -fno-omit-frame-pointer -fPIC -DUIFILE='"/usr/share/postgresql/15/contrib/bg_mon.html"' -DHAS_LIBBROTLI -I. -I./ -I/usr/include/postgresql/15/server -I/usr/include/postgresql/internal -Wdate-time -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -I/usr/include/libxml2 -c -o bg_mon.o bg_mon.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels -Wmissing-format-attribute -Wimplicit-fallthrough=3 -Wcast-function-type -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -Wno-format-truncation -Wno-stringop-truncation -g -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -fno-omit-frame-pointer -fPIC -DUIFILE='"/usr/share/postgresql/15/contrib/bg_mon.html"' -DHAS_LIBBROTLI -I. -I./ -I/usr/include/postgresql/15/server -I/usr/include/postgresql/internal -Wdate-time -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -I/usr/include/libxml2 -c -o brotli_utils.o brotli_utils.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels -Wmissing-format-attribute -Wimplicit-fallthrough=3 -Wcast-function-type -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -Wno-format-truncation -Wno-stringop-truncation -g -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -fno-omit-frame-pointer -fPIC -DUIFILE='"/usr/share/postgresql/15/contrib/bg_mon.html"' -DHAS_LIBBROTLI -I. -I./ -I/usr/include/postgresql/15/server -I/usr/include/postgresql/internal -Wdate-time -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -I/usr/include/libxml2 -c -o disk_stats.o disk_stats.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels -Wmissing-format-attribute -Wimplicit-fallthrough=3 -Wcast-function-type -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -Wno-format-truncation -Wno-stringop-truncation -g -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -fno-omit-frame-pointer -fPIC -DUIFILE='"/usr/share/postgresql/15/contrib/bg_mon.html"' -DHAS_LIBBROTLI -I. -I./ -I/usr/include/postgresql/15/server -I/usr/include/postgresql/internal -Wdate-time -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -I/usr/include/libxml2 -c -o net_stats.o net_stats.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels -Wmissing-format-attribute -Wimplicit-fallthrough=3 -Wcast-function-type -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -Wno-format-truncation -Wno-stringop-truncation -g -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -fno-omit-frame-pointer -fPIC -DUIFILE='"/usr/share/postgresql/15/contrib/bg_mon.html"' -DHAS_LIBBROTLI -I. -I./ -I/usr/include/postgresql/15/server -I/usr/include/postgresql/internal -Wdate-time -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -I/usr/include/libxml2 -c -o postgres_stats.o postgres_stats.c
postgres_stats.c: In function ‘get_pg_stat_activity’:
postgres_stats.c:1131:3: error: too few arguments to function ‘InitPostgres’
1131 | InitPostgres("postgres", InvalidOid, NULL, InvalidOid, NULL, false);
| ^~~~~~~~~~~~
In file included from postgres_stats.c:6:
/usr/include/postgresql/15/server/miscadmin.h:460:13: note: declared here
460 | extern void InitPostgres(const char *in_dbname, Oid dboid,
| ^~~~~~~~~~~~
make: *** [<builtin>: postgres_stats.o] Error 1
Segmentation fault issue
We have found that PostgreSQL has killed itself after a segmentation fault issued against the bg_mon extension:
2018-11-09 07:54:18 UTC [22072]: [9499-1] user=,db= LOG: worker process: bg_mon (PID 20867) was terminated by signal 11: Segmentation fault
2018-11-09 07:54:18 UTC [22072]: [9500-1] user=,db= DETAIL: Failed process was running: WITH locked_processes AS (SELECT this.pid [ ... ]
2018-11-09 07:54:18 UTC [22072]: [9501-1] user=,db= LOG: terminating any other active server processes
2018-11-09 07:54:18 UTC [20875]: [1-1] user=postgres,db=[unknown] WARNING: terminating connection because of crash of another server process
2018-11-09 07:54:18 UTC [20875]: [2-1] user=postgres,db=[unknown] DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory.
2018-11-09 07:54:18 UTC [20875]: [3-1] user=postgres,db=[unknown] HINT: In a moment you should be able to reconnect to the database and repeat your command.
2018-11-09 07:54:19 UTC [3580]: [1-1] user=postgres,db=postgres FATAL: the database system is in recovery mode
Since we've disabled it, we never run into that issue again.
We are using PostgreSQL v10.5 on Ubuntu 16.04 LTS.
Not sure why this happened or if this information is helpful. Let me know if I can provide other information.
[Discuss] Track sizes of certain subdirectories in bg_mon
Hello, @CyberDem0n
I would like to extend bg_mon to report the sizes of pg_replslot and pgsql_tmp. My question is how to do it in the best way.
-
I can follow the implementation of
pg_logdirectory size . That however will duplicate databg_monreports under thedevicekey for the most common case where all subdirectories reside at the same place (such duplication already happens fordata,wal, andlogentries). This approach also does not look extensible if one needs to add sizes of more subdirectories of$PGDATAto thebg_monin the future. -
Or I can create a separate
subdirectoriesdictionary with"subdirectory": its size in KBkey-value pairs. The dictionary will list all subdirectories in $PGDATA
wdyt ?
web ui can't be open
bg_mon process stuck in uninterruptible sleep
We are looking at an issue that some of our postgres instances running with the Zalando Operator (Version 1.10.1, PVCs on NFS, Spilo Image spilo-15:3.0-p1), sometimes get stuck during restart. The instances cannot be killed with pg_ctl -m immediate stop and when using pg_ctl kill KILL, usually a single process stuck in uninterruptible sleep remains:
1000710+ 1191929 0.0 0.0 630156 26628 ? Ds Jan18 2:05 postgres: our-postgres: bg_mon
Unfortunately I missed capturing the stack of that process before finally rebooting the machine (will certainly do it next time), but I would like to start a discussion here if there are any known issues around this or if you have any suspicions what could cause this.
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