PostgreSQL : SSL SYSCALL 오류 : EOF 감지

11

먼저이 오류와 관련된 여러 게시물을 검색하고 발견했으며 대부분 RAM 문제 또는 SSL 문제를 지적했으며 명령 줄에 sslmode = disabled를 추가하여 SSL 가능성을 극복하려고 시도했습니다. 

 psql -U waypoint -d waypoint -W -c "alter table telemetria_data.historico alter clase type smallint, alter valor type real[], alter power type smallint, alter voltaje type real;" -h localhost -v sslmode=disable

그러나 같은 메시지가 나타납니다.

SSL SYSCALL error: EOF detected
connection to server was lost

가능한 메모리 문제와 관련하여 문제를 해결하는 방법을 모르겠습니다.

데이터 구조는 이 질문에 설명 된 것으로, 상속 된 모든 테이블에 대해 전체 변경 테이블을 완료하기 위해 매우 오래 실행되는 쿼리가 될 수 있습니다.

운영체제 : 

Linux ip-10-1-0-9 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/Linux

PostgreSQL :

PostgreSQL 9.4.9 on x86_64-unknown-linux-gnu, compiled by gcc (Debian 4.9.2-10) 4.9.2, 64-bit

2017-06-01 13:50 GMT 업데이트

@ Daniel Vérité의 권장 사항으로 인해 명령이 다음과 같이 변경되었습니다.

time PGSSLMODE=disable psql -U waypoint -d waypoint -W -c "alter table telemetria_data.historico alter clase type smallint, alter valor type real[], alter power type smallint, alter voltaje type real;" -h localhost

문제가 실제로 다음과 같이 변경되었습니다.

server closed the connection unexpectedly
    This probably means the server terminated abnormally
    before or while processing the request.
connection to server was lost

2017-06-01 15:34 GMT 업데이트

/var/log/postgresql/postgresql-9.4-main.log다음과 같은 몇 가지 로그 항목을 찾았습니다 .

2017-06-01 13:48:49 UTC [22899-357] LOG:  checkpoints are occurring too frequently (19 seconds apart)
2017-06-01 13:48:49 UTC [22899-358] HINT:  Consider increasing the configuration parameter "checkpoint_segments".

제안 된 힌트로 진행하겠습니다.

또한 실제로 충돌 및 이후 복구를 나타내는이 항목 그룹을 찾았습니다.

2017-06-01 13:49:04 UTC [4982-17] LOG:  server process (PID 6569) was terminated by signal 9: Killed
2017-06-01 13:49:04 UTC [4982-18] DETAIL:  Failed process was running: alter table telemetria_data.historico alter clase type smallint, alter valor type real[], alter power type smallint, alter voltaje type real;
2017-06-01 13:49:04 UTC [4982-19] LOG:  terminating any other active server processes
2017-06-01 13:49:04 UTC [22902-2] WARNING:  terminating connection because of crash of another server process
2017-06-01 13:49:04 UTC [22902-3] 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.
2017-06-01 13:49:04 UTC [22902-4] HINT:  In a moment you should be able to reconnect to the database and repeat your command.
2017-06-01 13:49:04 UTC [16383-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:04 UTC [16384-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:04 UTC [16386-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:04 UTC [16385-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:04 UTC [4982-20] LOG:  all server processes terminated; reinitializing
2017-06-01 13:49:05 UTC [16402-1] LOG:  database system was interrupted; last known up at 2017-06-01 13:48:45 UTC
2017-06-01 13:49:05 UTC [16403-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:05 UTC [16404-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:05 UTC [16414-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:05 UTC [16415-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:06 UTC [16452-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:06 UTC [16453-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:06 UTC [16462-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:06 UTC [16463-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:06 UTC [16472-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:06 UTC [16473-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:06 UTC [16482-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:06 UTC [16483-1] waypoint@waypoint FATAL:  the database system is in recovery mode
2017-06-01 13:49:09 UTC [16402-2] LOG:  database system was not properly shut down; automatic recovery in progress
2017-06-01 13:49:09 UTC [16402-3] LOG:  redo starts at 11EC/9960F440
2017-06-01 13:49:21 UTC [16402-4] LOG:  unexpected pageaddr 11E6/52726000 in log segment 00000001000011EC000000C9, offset 7495680
2017-06-01 13:49:21 UTC [16402-5] LOG:  redo done at 11EC/C9723D60
2017-06-01 13:49:32 UTC [16402-6] LOG:  MultiXact member wraparound protections are now enabled
2017-06-01 13:49:32 UTC [4982-21] LOG:  database system is ready to accept connections

이 마지막 로그 부분에 대한 제안 사항이 있습니까?

OOM Killer가 활성화되었으며 다음과 같은 결과가 출력됩니다 /var/log/messages.

Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.672817] psql invoked oom-killer: gfp_mask=0x2000d0, order=2, oom_score_adj=0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.675652] psql cpuset=/ mems_allowed=0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.677274] CPU: 1 PID: 16367 Comm: psql Not tainted 3.16.0-4-amd64 #1 Debian 3.16.36-1+deb8u2
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680406] Hardware name: Xen HVM domU, BIOS 4.2.amazon 11/11/2016
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  0000000000000000 ffffffff815123b5 ffff88003dcda1d0 0000000000000000
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  ffffffff8150ff8d 0000000000000000 ffffffff810d6e3f 0000000000000000
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  ffffffff81516d2e 0000000000000200 ffffffff810689d3 ffffffff810c43e4
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557] Call Trace:
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff815123b5>] ? dump_stack+0x5d/0x78
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff8150ff8d>] ? dump_header+0x76/0x1e8
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff810d6e3f>] ? smp_call_function_single+0x5f/0xa0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff81516d2e>] ? mutex_lock+0xe/0x2a
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff810689d3>] ? put_online_cpus+0x23/0x80
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff810c43e4>] ? rcu_oom_notify+0xc4/0xe0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff81153d1c>] ? do_try_to_free_pages+0x4ac/0x520
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff811427dd>] ? oom_kill_process+0x21d/0x370
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff8114239d>] ? find_lock_task_mm+0x3d/0x90
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff81142f43>] ? out_of_memory+0x473/0x4b0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff81148e0f>] ? __alloc_pages_nodemask+0x9ef/0xb50
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff81065c86>] ? copy_process.part.25+0x116/0x1c50
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffffa00f6bba>] ? call_filldir+0x9a/0x160 [ext4]
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff81058301>] ? __do_page_fault+0x1d1/0x4f0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff811ac3f9>] ? get_empty_filp+0xc9/0x1c0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff81067990>] ? do_fork+0xe0/0x3d0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff811c6a1c>] ? __alloc_fd+0x7c/0x120
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff815188f9>] ? stub_clone+0x69/0x90
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.680557]  [<ffffffff8151858d>] ? system_call_fast_compare_end+0x10/0x15
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.734210] Mem-Info:
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.735151] Node 0 DMA per-cpu:
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.736512] CPU    0: hi:    0, btch:   1 usd:   0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.738300] CPU    1: hi:    0, btch:   1 usd:   0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.740072] Node 0 DMA32 per-cpu:
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.741335] CPU    0: hi:  186, btch:  31 usd:   0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.743092] CPU    1: hi:  186, btch:  31 usd:   0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.745210] active_anon:370484 inactive_anon:549110 isolated_anon:24
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.745210]  active_file:240 inactive_file:1425 isolated_file:0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.745210]  unevictable:0 dirty:173 writeback:0 unstable:0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.745210]  free:20427 slab_reclaimable:9729 slab_unreclaimable:3425
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.745210]  mapped:567547 shmem:587500 pagetables:4209 bounce:0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.745210]  free_cma:0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.760872] Node 0 DMA free:15224kB min:184kB low:228kB high:276kB active_anon:228kB inactive_anon:188kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15988kB managed:15904kB mlocked:0kB dirty:0kB writeback:0kB mapped:144kB shmem:204kB slab_reclaimable:4kB slab_unreclaimable:80kB kernel_stack:80kB pagetables:4kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.777646] lowmem_reserve[]: 0 3757 3757 3757
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.779553] Node 0 DMA32 free:69956kB min:44868kB low:56084kB high:67300kB active_anon:1481708kB inactive_anon:2196252kB active_file:1772kB inactive_file:1748kB unevictable:0kB isolated(anon):96kB isolated(file):0kB present:3915776kB managed:3849676kB mlocked:0kB dirty:0kB writeback:0kB mapped:2267676kB shmem:2349796kB slab_reclaimable:38712kB slab_unreclaimable:13620kB kernel_stack:2032kB pagetables:16832kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:14 all_unreclaimable? no
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.795757] lowmem_reserve[]: 0 0 0 0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.797650] Node 0 DMA: 11*4kB (EM) 8*8kB (EM) 1*16kB (E) 2*32kB (UE) 1*64kB (E) 1*128kB (E) 2*256kB (UE) 2*512kB (EM) 3*1024kB (UEM) 3*2048kB (EMR) 1*4096kB (M) = 15228kB
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.804011] Node 0 DMA32: 13752*4kB (UEM) 85*8kB (EM) 54*16kB (M) 43*32kB (M) 17*64kB (M) 15*128kB (M) 10*256kB (M) 3*512kB (M) 2*1024kB (M) 0*2048kB 1*4096kB (R) = 71176kB
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.811528] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.815461] 588017 total pagecache pages
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.816967] 0 pages in swap cache
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.818205] Swap cache stats: add 0, delete 0, find 0/0
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.820215] Free swap  = 0kB
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.821475] Total swap = 0kB
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.822543] 982941 pages RAM
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.823640] 0 pages HighMem/MovableOnly
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.825110] 16525 pages reserved
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.826310] 0 pages hwpoisoned
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.827473] [ pid ]   uid  tgid total_vm      rss nr_ptes swapents oom_score_adj name
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.830523] [  159]     0   159     8242      800      21        0             0 systemd-journal
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.833717] [  162]     0   162    10200      135      22        0         -1000 systemd-udevd
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.836679] [  316]     0   316     6351     1726      14        0             0 dhclient
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.839533] [  351]     0   351     7181       72      18        0             0 cron
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.842112] [  353]     0   353     4964       68      14        0             0 systemd-logind
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.844894] [  362]   107   362    10531       96      26        0          -900 dbus-daemon
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.847504] [  376]   106   376     8345      154      21        0             0 ntpd
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.850085] [  377]     0   377    65721      457      30        0             0 rsyslogd
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.852755] [  388]     0   388     3909       39      12        0             0 agetty
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.855305] [  389]     0   389     3864       40      13        0             0 agetty
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.857914] [  451]     0   451    13796      168      29        0         -1000 sshd
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.860562] [  481]  1002   481    26362     5081      54        0             0 perfmon_loop.rb
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.863918] [  486]  1002   486    15211     3146      31        0             0 cht_perfmon
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.867273] [  625]     0   625     9560      144      22        0             0 master
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.869878] [  630]   108   630    10164      234      24        0             0 qmgr
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.872356] [ 3443]     0  3443    20130      213      41        0             0 sshd
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.874903] [ 3445]  1000  3445    20164      222      39        0             0 sshd
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.877451] [ 3446]  1000  3446     3176       43       9        0             0 sftp-server
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.880261] [ 4982]   105  4982   614831    42946     132        0          -900 postgres
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.882988] [ 6634]     0  6634     1570       23       9        0             0 collectdmon
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.885784] [ 6635]     0  6635   174485      156      36        0             0 collectd
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.888347] [22899]   105 22899   615399   541666    1105        0             0 postgres
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.890970] [22900]   105 22900   615395    14251      88        0             0 postgres
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.893836] [22901]   105 22901   615088     4252      53        0             0 postgres
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.896365] [22902]   105 22902   615305     1316      60        0             0 postgres
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.899083] [22903]   105 22903    21336      378      40        0             0 postgres
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.901954] [ 2946]   108  2946    10076      137      22        0             0 pickup
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.904462] [ 6376]     0  6376    20130      213      42        0             0 sshd
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.907440] [ 6378]  1000  6378    20130      209      40        0             0 sshd
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.910534] [ 6379]  1000  6379     5795      151      16        0             0 bash
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.913144] [ 6382]     0  6382    11515      107      28        0             0 sudo
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.915635] [ 6383]     0  6383    11895       96      27        0             0 su
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.918149] [ 6384]   105  6384     5796      139      16        0             0 bash
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.920900] [ 6561]   105  6561    18289      236      40        0             0 psql
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.923394] [ 6569]   105  6569   925161   853454    1718        0             0 postgres
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.926097] [16319]     0 16319    10865       95      25        0             0 cron
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.928611] [16320]     0 16320    10865       95      25        0             0 cron
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.931063] [16321]     0 16321    10865       95      25        0             0 cron
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.933758] [16322]     0 16322    10865       95      25        0             0 cron
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.936197] [16323]  1000 16323     1084       20       7        0             0 sh
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.938762] [16324]  1000 16324     1084       20       7        0             0 sh
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.941450] [16325]  1000 16325     1084       21       7        0             0 sh
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.943849] [16326]  1000 16326     1084       21       6        0             0 sh
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.946409] [16327]  1000 16327     3612       54      12        0             0 telemetria.sh
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.949258] [16328]  1000 16328     3613       57      12        0             0 instantaneo.sh
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.952633] [16329]  1000 16329    21335     4808      48        0             0 mon-put-instanc
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.955744] [16330]  1000 16330     3612       54      12        0             0 conexiones.sh
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.958555] [16366]  1000 16366    10744     1513      26        0             0 psql
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.961216] [16367]  1000 16367    10735     1512      26        0             0 psql
Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.963722] [16368]  1000 16368     7725     1044      19        0             0 aws

2017-06-01 16:19 GMT 업데이트

설정이 다음으로 변경되었습니다. 

checkpoint_segments = 100       # in logfile segments, min 1, 16MB each
checkpoint_timeout = 30s        # range 30s-1h

하드 드라이브를 가득 채웠습니다. 아니면 사용중인 임시 공간을 비울 수있는 방법이 있습니까? 지금 낭비되고 있습니까?

ERROR:  could not extend file "base/16384/3940428": No space left on device
HINT:  Check free disk space.

@deszo의 질문에 따라 메모리 오버 커밋 값은 다음과 같습니다.

vm.nr_overcommit_hugepages = 0
vm.overcommit_kbytes = 0
vm.overcommit_memory = 0
vm.overcommit_ratio = 50

2017-06-01 18 : 107 GMT 업데이트

서버 인스턴스는 AWS c4.large (2 개의 vCPU, 3.75GB RAM)

몇 가지 추가 매개 변수 from postgresql.conf:

shared_buffers = 2GB            # min 128kB
work_mem = 32MB             # min 64kB
max_connections =800            # (change requires restart)
postgresql  postgresql-9.4  aws 
— 곤잘로 바스케스
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1
백엔드 충돌처럼 보입니다. 메모리 부족 상태 일 수 있습니다. postgresql 서버 로그를 확인하고 OS가 Linux이고 OOM 킬러가 활성화 된 경우 실패시 커널 로그가 기록됩니다.
— Daniel Vérité 2016 년
@ DanielVérité 님이 PostgreSQL 및 커널 로그 항목을 질문에 추가했습니다
— Gonzalo Vasquez
1
postgresql.org/docs/current/static/…- 이것과는 별도로 인스턴스의 RAM 크기는 얼마입니까? 무엇 shared_buffers, work_mem그리고 max_connections으로 설정?
— dezso 2016 년
@dezso가 추가했습니다 ... 링크의 팁을 따라야하지만 디스크 전체 문제에서 인스턴스를 "복구"하면;)
— Gonzalo Vasquez

답변:

6

내 생각에 당신은 AWS에서 PostgreSQL을 실행하고 있습니다. 그렇다면 질문과 태그에서이를 식별해야합니다.

커널 덤프에서 언급 된 마지막 프로세스는 실제로 aws안전한 내기처럼 보입니다.

Jun  1 13:49:04 ip-10-1-0-9 kernel: [260956.963722] [16368]  1000 16368     7725     1044      19        0             0 aws

PostgreSQL과 관련하여 이는 연결 실패를 의미 합니다.

AWS의 oom_killer를 유발하는 문제를 해결하는 데는 두 가지 옵션이 있습니다.

  • work_memoom_killer를 트리거하는 임계 값 아래로 낮 춥니 다. 메모리 차이에 따라 쿼리가 다르게 계획되거나 느리게 진행되는 것이 무엇이든 당신을 지탱하는 것입니다.
  • log_statement메모리 부족 충돌 전에 마지막 쿼리 문제를 설정 하고 읽습니다.
— 에반 캐롤
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