Masalah
Kami memiliki masalah aneh pada pengaturan mongodb kami. Kadang-kadang kita mendapatkan puncak koneksi tinggi dan antrian tinggi dan proses mongodb berhenti merespons jika kita membiarkan antrian dan koneksi meningkat. Kita perlu me-restart instance menggunakan sigkill dengan htop .
Tampaknya ada batas sistem / konfigurasi mongodb yang memblokir mongodb dari operasi, karena sumber daya perangkat keras ok. Versi dari masalah ini terjadi secara berdiri sendiri dan kemudian replika ditetapkan pada server produksi. Detail di depan.
Tentang lingkungan perangkat lunak
Ini adalah contoh mongodb yang berdiri sendiri (bukan sharded atau set replika), itu beroperasi pada mesin khusus, dan itu dipertanyakan oleh mesin lain. Saya menggunakan mongodb-linux-x86_64-2.6.12 di bawah Debian 7.7.
Mesin query mongo menggunakan Django == 1.7.4, Mongoengine = 0.10.1 dengan pymongo == 2.8, nginx 1.6.2 dan gunicorn 19.1.1.
Pada file Django settings.py saya terhubung ke database menggunakan baris berikut:
from mongoengine import connect
connect(
MONGO_DB,
username = MONGO_USER,
password = MONGO_PWD,
host = MONGO_HOST,
port = MONGO_PORT
)
Statistik MMS
Seperti yang dapat Anda lihat di gambar berikut dari layanan MMS, kami memiliki puncak tentang koneksi dan antrian:
Ketika ini terjadi, proses mongodb kami benar-benar membeku. Kita harus menggunakan SIGKILL untuk me-restart mongodb, yang benar-benar buruk.
Dalam gambar ada 3 peristiwa beku .
Seperti yang ditunjukkan img, saat ini terjadi, kami juga memiliki puncak pada Memori Virtual Non-Pemetaan.
Kami juga melihat peningkatan pada grafik Btree di sekitar pembekuan ke-2 dan ke-3.
Kami telah memeriksa log, tetapi tidak ada permintaan yang mencurigakan, juga Opcounter tidak meroket, tampaknya tidak ada lagi kueri dari biasanya.
Berikut ini adalah tangkapan layar lain pada bug yang sama tetapi pada hari / waktu yang lain:
Pada semua kasus, kunci pada DB tidak meningkat secara signifikan, memiliki puncak tetapi bahkan tidak mencapai 4%:
OpCounter turun ke nol, tampaknya setiap op pergi ke antrian mongodb, sehingga database membuat koneksi baru untuk mencoba mengeksekusi permintaan baru, semuanya pergi ke antrian juga.
Sumber Daya Mesin
Mengenai perangkat keras, mesin ini adalah instance Google Cloud Compute dengan 4 Intel Xeon Cores, 16 Gb ram, disk SSD 100 GB .
Tidak ada masalah jaringan / io / CPU / ram yang terdeteksi, tidak ada puncak sumber daya, bahkan ketika proses mongod dibekukan.
MySQL di komputer lain juga terpengaruh
Kami juga mendeteksi bahwa pada saat yang sama puncak mongod ini pada antrian dan koneksi, kami juga mendapatkan lonjakan pada koneksi mysql, yang berjalan di komputer lain . Ketika saya mematikan proses mongodb, semua koneksi mysql dilepaskan juga (tanpa me-restart mysql).
ulimit
Kami menetapkan batas sistem seperti yang disarankan pada artikel MongoDB ini , untuk melihat apakah itu penyebab masalah tetapi tampaknya ini tidak memperbaiki masalah.
Lonjakan koneksi terus berlanjut. Tampaknya setiap permintaan aplikasi telah masuk ke antrian saat masalah ini dimulai.
$ ulimit -a
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 60240
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 409600
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 60240
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
db.currentOp
Saya baru saja menambahkan skrip shell yang berjalan setiap 1 detik dengan yang berikut:
var ops = db.currentOp().inprog
if (ops !== undefined && ops.length > 0){
ops.forEach(function(op){
if(op.secs_running > 0) printjson(op);
})
}
Log tidak melaporkan operasi apa pun yang membutuhkan waktu lebih dari 1 detik untuk dijalankan. Saya sedang berpikir tentang suatu proses yang memakan waktu lama pada sesuatu tetapi tampaknya bukan itu masalahnya.
Utas MongoDB
Mirip dengan koneksi, saya memantau utas proses mongod -f, inilah yang terjadi, mirip dengan koneksi:
[Wed May 18 19:02:01 UTC 2016] MONGOD PROCESSES 1 THREADS 94
[Wed May 18 19:03:01 UTC 2016] MONGOD PROCESSES 1 THREADS 94
# starts
[Wed May 18 19:04:01 UTC 2016] MONGOD PROCESSES 1 THREADS 96
[Wed May 18 19:05:01 UTC 2016] MONGOD PROCESSES 1 THREADS 118
[Wed May 18 19:09:01 UTC 2016] MONGOD PROCESSES 1 THREADS 196
[Wed May 18 19:10:01 UTC 2016] MONGOD PROCESSES 1 THREADS 211
# sigkill to mongodb
[Wed May 18 19:11:01 UTC 2016] MONGOD PROCESSES 3 THREADS 6
[Wed May 18 19:12:01 UTC 2016] MONGOD PROCESSES 1 THREADS 43
[Wed May 18 19:13:01 UTC 2016] MONGOD PROCESSES 1 THREADS 48
Log MongoDB
Mengenai mongodb.log, ini adalah log mongodb penuh di sekitar masalahnya. Itu hanya terjadi pada log line 361. Di sana koneksi mulai naik, dan tidak ada lagi pertanyaan dijalankan. Saya juga tidak bisa menyebut shell mongo, katanya:
[Wed Feb 10 15:46:01 UTC 2016] 2016-02-10T15:48:31.940+0000 DBClientCursor::init call() failed
2016-02-10T15:48:31.941+0000 Error: DBClientBase::findN: transport error: 127.0.0.1:27000 ns: admin.$cmd query: { whatsmyuri: 1 } at src/mongo/shell/mongo.js:148
Ekstrak log
2016-02-10T15:41:39.930+0000 [initandlisten] connection accepted from 10.240.0.3:56611 #3665 (79 connections now open)
2016-02-10T15:41:39.930+0000 [conn3665] command admin.$cmd command: getnonce { getnonce: 1 } keyUpdates:0 numYields:0 reslen:65 0ms
2016-02-10T15:41:39.930+0000 [conn3665] command admin.$cmd command: ping { ping: 1 } keyUpdates:0 numYields:0 reslen:37 0ms
2016-02-10T15:41:39.992+0000 [conn3529] command db.$cmd command: count { count: "notification", fields: null, query: { read: false, recipient: 310 } } planSummary: IXSCAN { recipient: 1 } keyUpdates:0 numYields:0 locks(micros) r:215 reslen:48 0ms
2016-02-10T15:41:40.038+0000 [conn2303] query db.column query: { _id: ObjectId('56b395dfbe66324cbee550b8'), client_id: 20 } planSummary: IXSCAN { _id: 1 } ntoreturn:2 ntoskip:0 nscanned:1 nscannedObjects:1 keyUpdates:0 numYields:0 locks(micros) r:116 nreturned:1 reslen:470 0ms
2016-02-10T15:41:40.044+0000 [conn1871] update db.column query: { _id: ObjectId('56b395dfbe66324cbee550b8') } update: { $set: { last_request: new Date(1455118900040) } } nscanned:1 nscannedObjects:1 nMatched:1 nModified:1 fastmod:1 keyUpdates:0 numYields:0 locks(micros) w:126 0ms
2016-02-10T15:41:40.044+0000 [conn1871] command db.$cmd command: update { update: "column", writeConcern: { w: 1 }, updates: [ { q: { _id: ObjectId('56b395dfbe66324cbee550b8') }, u: { $set: { last_request: new Date(1455118900040) } }, multi: false, upsert: true } ] } keyUpdates:0 numYields:0 reslen:55 0ms
2016-02-10T15:41:40.048+0000 [conn1875] query db.user query: { sn: "mobile", client_id: 20, uid: "56990023700" } planSummary: IXSCAN { client_id: 1, uid: 1, sn: 1 } ntoreturn:2 ntoskip:0 nscanned:1 nscannedObjects:1 keyUpdates:0 numYields:0 locks(micros) r:197 nreturned:1 reslen:303 0ms
2016-02-10T15:41:40.056+0000 [conn2303] Winning plan had zero results. Not caching. ns: db.case query: { sn: "mobile", client_id: 20, created: { $gt: new Date(1454295600000), $lt: new Date(1456800900000) }, deleted: false, establishment_users: { $all: [ ObjectId('5637640afefa2654b5d863e3') ] }, is_closed: true, updated_time: { $gt: new Date(1455045840000) } } sort: { updated_time: 1 } projection: {} skip: 0 limit: 15 winner score: 1.0003 winner summary: IXSCAN { client_id: 1, is_closed: 1, deleted: 1, updated_time: 1 }
2016-02-10T15:41:40.057+0000 [conn2303] query db.case query: { $query: { sn: "mobile", client_id: 20, created: { $gt: new Date(1454295600000), $lt: new Date(1456800900000) }, deleted: false, establishment_users: { $all: [ ObjectId('5637640afefa2654b5d863e3') ] }, is_closed: true, updated_time: { $gt: new Date(1455045840000) } }, $orderby: { updated_time: 1 } } planSummary: IXSCAN { client_id: 1, is_closed: 1, deleted: 1, updated_time: 1 } ntoreturn:15 ntoskip:0 nscanned:26 nscannedObjects:26 keyUpdates:0 numYields:0 locks(micros) r:5092 nreturned:0 reslen:20 5ms
2016-02-10T15:41:40.060+0000 [conn300] command db.$cmd command: count { count: "notification", fields: null, query: { read: false, recipient: 309 } } planSummary: IXSCAN { recipient: 1 } keyUpdates:0 numYields:0 locks(micros) r:63 reslen:48 0ms
2016-02-10T15:41:40.547+0000 [conn3529] query db.case query: { $query: { answered: true, sn: "email", client_id: 1, establishment_users: { $all: [ ObjectId('5669b930fefa2626db389c0e') ] }, deleted: false, is_closed: { $ne: true } }, $orderby: { updated_time: -1 } } planSummary: IXSCAN { client_id: 1, establishment_users: 1, updated_time: 1 } ntoskip:0 nscanned:103 nscannedObjects:103 keyUpdates:0 numYields:0 locks(micros) r:9410 nreturned:0 reslen:20 9ms
2016-02-10T15:41:40.557+0000 [conn3529] Winning plan had zero results. Not caching. ns: db.case query: { answered: true, sn: "email", client_id: 1, establishment_users: { $all: [ ObjectId('5669b930fefa2626db389c0e') ] }, deleted: false, is_closed: { $ne: true } } sort: { updated_time: -1 } projection: {} skip: 0 limit: 15 winner score: 1.0003 winner summary: IXSCAN { client_id: 1, establishment_users: 1, updated_time: 1 }
2016-02-10T15:41:40.558+0000 [conn3529] query db.case query: { $query: { answered: true, sn: "email", client_id: 1, establishment_users: { $all: [ ObjectId('5669b930fefa2626db389c0e') ] }, deleted: false, is_closed: { $ne: true } }, $orderby: { updated_time: -1 } } planSummary: IXSCAN { client_id: 1, establishment_users: 1, updated_time: 1 } ntoreturn:15 ntoskip:0 nscanned:103 nscannedObjects:103 keyUpdates:0 numYields:0 locks(micros) r:7572 nreturned:0 reslen:20 7ms
2016-02-10T15:41:40.569+0000 [conn3028] command db.$cmd command: count { count: "notification", fields: null, query: { read: false, recipient: 145 } } planSummary: IXSCAN { recipient: 1 } keyUpdates:0 numYields:0 locks(micros) r:237 reslen:48 0ms
2016-02-10T15:41:40.774+0000 [conn3053] command db.$cmd command: count { count: "notification", fields: null, query: { read: false, recipient: 143 } } planSummary: IXSCAN { recipient: 1 } keyUpdates:0 numYields:0 locks(micros) r:372 reslen:48 0ms
2016-02-10T15:41:41.056+0000 [conn22] command admin.$cmd command: ping { ping: 1 } keyUpdates:0 numYields:0 reslen:37 0ms
#########################
HERE THE PROBLEM STARTS
#########################
2016-02-10T15:41:41.175+0000 [initandlisten] connection accepted from 127.0.0.1:43268 #3667 (80 connections now open)
2016-02-10T15:41:41.212+0000 [initandlisten] connection accepted from 10.240.0.6:46021 #3668 (81 connections now open)
2016-02-10T15:41:41.213+0000 [conn3668] command db.$cmd command: getnonce { getnonce: 1 } keyUpdates:0 numYields:0 reslen:65 0ms
2016-02-10T15:41:41.213+0000 [conn3668] authenticate db: db { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" }
2016-02-10T15:41:41.213+0000 [conn3668] command db.$cmd command: authenticate { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" } keyUpdates:0 numYields:0 reslen:82 0ms
2016-02-10T15:41:41.348+0000 [initandlisten] connection accepted from 10.240.0.6:46024 #3669 (82 connections now open)
2016-02-10T15:41:41.349+0000 [conn3669] command db.$cmd command: getnonce { getnonce: 1 } keyUpdates:0 numYields:0 reslen:65 0ms
2016-02-10T15:41:41.349+0000 [conn3669] authenticate db: db { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" }
2016-02-10T15:41:41.349+0000 [conn3669] command db.$cmd command: authenticate { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" } keyUpdates:0 numYields:0 reslen:82 0ms
2016-02-10T15:41:43.620+0000 [initandlisten] connection accepted from 10.240.0.6:46055 #3670 (83 connections now open)
2016-02-10T15:41:43.621+0000 [conn3670] command db.$cmd command: getnonce { getnonce: 1 } keyUpdates:0 numYields:0 reslen:65 0ms
2016-02-10T15:41:43.621+0000 [conn3670] authenticate db: db { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" }
2016-02-10T15:41:43.621+0000 [conn3670] command db.$cmd command: authenticate { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" } keyUpdates:0 numYields:0 reslen:82 0ms
2016-02-10T15:41:43.655+0000 [initandlisten] connection accepted from 10.240.0.6:46058 #3671 (84 connections now open)
2016-02-10T15:41:43.656+0000 [conn3671] command db.$cmd command: getnonce { getnonce: 1 } keyUpdates:0 numYields:0 reslen:65 0ms
2016-02-10T15:41:43.656+0000 [conn3671] authenticate db: db { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" }
2016-02-10T15:41:43.656+0000 [conn3671] command db.$cmd command: authenticate { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" } keyUpdates:0 numYields:0 reslen:82 0ms
2016-02-10T15:41:44.045+0000 [initandlisten] connection accepted from 10.240.0.6:46071 #3672 (85 connections now open)
2016-02-10T15:41:44.045+0000 [conn3672] command db.$cmd command: getnonce { getnonce: 1 } keyUpdates:0 numYields:0 reslen:65 0ms
2016-02-10T15:41:44.046+0000 [conn3672] authenticate db: db { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" }
2016-02-10T15:41:44.046+0000 [conn3672] command db.$cmd command: authenticate { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" } keyUpdates:0 numYields:0 reslen:82 0ms
2016-02-10T15:41:44.083+0000 [initandlisten] connection accepted from 10.240.0.6:46073 #3673 (86 connections now open)
2016-02-10T15:41:44.084+0000 [conn3673] command db.$cmd command: getnonce { getnonce: 1 } keyUpdates:0 numYields:0 reslen:65 0ms
2016-02-10T15:41:44.084+0000 [conn3673] authenticate db: db { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" }
2016-02-10T15:41:44.084+0000 [conn3673] command db.$cmd command: authenticate { authenticate: 1, user: "xxx", nonce: "xxx", key: "xxx" } keyUpdates:0 numYields:0 reslen:82 0ms
2016-02-10T15:41:44.182+0000 [initandlisten] connection accepted from 10.240.0.6:46076 #3674 (87 connections now open)
Informasi Pengumpulan
Saat ini basis data kami berisi 163 koleksi. Yang penting adalah messages
, column
dan cases
, inilah yang mendapatkan sisipan berat, pembaruan, dan pertanyaan. Selebihnya jika untuk analitik dan banyak koleksi masing-masing sekitar 100 catatan:
{
"ns" : "db.message",
"count" : 2.96615e+06,
"size" : 3906258304.0000000000000000,
"avgObjSize" : 1316,
"storageSize" : 9305935856.0000000000000000,
"numExtents" : 25,
"nindexes" : 21,
"lastExtentSize" : 2.14643e+09,
"paddingFactor" : 1.0530000000000086,
"systemFlags" : 0,
"userFlags" : 1,
"totalIndexSize" : 7952525392.0000000000000000,
"indexSizes" : {
"_id_" : 1.63953e+08,
"client_id_1_sn_1_mid_1" : 3.16975e+08,
"client_id_1_created_1" : 1.89086e+08,
"client_id_1_recipients_1_created_1" : 4.3861e+08,
"client_id_1_author_1_created_1" : 2.29713e+08,
"client_id_1_kind_1_created_1" : 2.37088e+08,
"client_id_1_answered_1_created_1" : 1.90934e+08,
"client_id_1_is_mention_1_created_1" : 1.8674e+08,
"client_id_1_has_custom_data_1_created_1" : 1.9566e+08,
"client_id_1_assigned_1_created_1" : 1.86838e+08,
"client_id_1_published_1_created_1" : 1.94352e+08,
"client_id_1_sn_1_created_1" : 2.3681e+08,
"client_id_1_thread_root_1" : 1.88089e+08,
"client_id_1_case_id_1" : 1.89266e+08,
"client_id_1_sender_id_1" : 1.5182e+08,
"client_id_1_recipient_id_1" : 1.49711e+08,
"client_id_1_mid_1_sn_1" : 3.17662e+08,
"text_text_created_1" : 3320641520.0000000000000000,
"client_id_1_sn_1_kind_1_recipient_id_1_created_1" : 3.15226e+08,
"client_id_1_sn_1_thread_root_1_created_1" : 3.06526e+08,
"client_id_1_case_id_1_created_1" : 2.46825e+08
},
"ok" : 1.0000000000000000
}
{
"ns" : "db.case",
"count" : 497661,
"size" : 5.33111e+08,
"avgObjSize" : 1071,
"storageSize" : 6.29637e+08,
"numExtents" : 16,
"nindexes" : 34,
"lastExtentSize" : 1.68743e+08,
"paddingFactor" : 1.0000000000000000,
"systemFlags" : 0,
"userFlags" : 1,
"totalIndexSize" : 8.46012e+08,
"indexSizes" : {
"_id_" : 2.30073e+07,
"client_id_1" : 1.99985e+07,
"is_closed, deleted_1" : 1.31061e+07,
"is_closed_1" : 1.36948e+07,
"sn_1" : 2.1274e+07,
"deleted_1" : 1.39728e+07,
"created_1" : 1.97777e+07,
"current_assignment_1" : 4.20819e+07,
"assigned_1" : 1.33678e+07,
"commented_1" : 1.36049e+07,
"has_custom_data_1" : 1.42426e+07,
"sentiment_start_1" : 1.36049e+07,
"sentiment_finish_1" : 1.37275e+07,
"updated_time_1" : 2.02192e+07,
"identifier_1" : 1.73822e+07,
"important_1" : 1.38256e+07,
"answered_1" : 1.41772e+07,
"client_id_1_is_closed_1_deleted_1_updated_time_1" : 2.90248e+07,
"client_id_1_is_closed_1_updated_time_1" : 2.86569e+07,
"client_id_1_sn_1_updated_time_1" : 3.58436e+07,
"client_id_1_deleted_1_updated_time_1" : 2.8477e+07,
"client_id_1_updated_time_1" : 2.79619e+07,
"client_id_1_current_assignment_1_updated_time_1" : 5.6071e+07,
"client_id_1_assigned_1_updated_time_1" : 2.87713e+07,
"client_id_1_commented_1_updated_time_1" : 2.86896e+07,
"client_id_1_has_custom_data_1_updated_time_1" : 2.88286e+07,
"client_id_1_sentiment_start_1_updated_time_1" : 2.87223e+07,
"client_id_1_sentiment_finish_1_updated_time_1" : 2.88776e+07,
"client_id_1_identifier_1_updated_time_1" : 3.48216e+07,
"client_id_1_important_1_updated_time_1" : 2.88776e+07,
"client_id_1_answered_1_updated_time_1" : 2.85669e+07,
"client_id_1_establishment_users_1_updated_time_1" : 3.93838e+07,
"client_id_1_identifier_1" : 1.86413e+07,
"client_id_1_sn_1_users_1_updated_time_1" : 4.47309e+07
},
"ok" : 1.0000000000000000
}
{
"ns" : "db.column",
"count" : 438,
"size" : 218672,
"avgObjSize" : 499,
"storageSize" : 696320,
"numExtents" : 4,
"nindexes" : 2,
"lastExtentSize" : 524288,
"paddingFactor" : 1.0000000000000000,
"systemFlags" : 0,
"userFlags" : 1,
"totalIndexSize" : 65408,
"indexSizes" : {
"_id_" : 32704,
"client_id_1_owner_1" : 32704
},
"ok" : 1.0000000000000000
}
Mongostat
Berikut adalah beberapa baris kami menjalankan mongostat selama operasi normal:
insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time
*0 34 2 *0 0 10|0 0 32.6g 65.5g 1.18g 0 db:0.1% 0 0|0 0|0 4k 39k 87 20:44:44
2 31 13 *0 0 7|0 0 32.6g 65.5g 1.17g 3 db:0.8% 0 0|0 0|0 9k 36k 87 20:44:45
1 18 2 *0 0 5|0 0 32.6g 65.5g 1.12g 0 db:0.4% 0 0|0 0|0 3k 18k 87 20:44:46
5 200 57 *0 0 43|0 0 32.6g 65.5g 1.13g 12 db:2.3% 0 0|0 0|0 46k 225k 86 20:44:47
1 78 23 *0 0 5|0 0 32.6g 65.5g 1.01g 1 db:1.6% 0 0|0 0|0 18k 313k 86 20:44:48
*0 10 1 *0 0 5|0 0 32.6g 65.5g 1004m 0 db:0.2% 0 0|0 1|0 1k 8k 86 20:44:49
3 48 23 *0 0 11|0 0 32.6g 65.5g 1.05g 4 db:1.1% 0 0|0 0|0 16k 48k 86 20:44:50
2 38 13 *0 0 8|0 0 32.6g 65.5g 1.01g 8 db:0.9% 0 0|0 0|0 10k 76k 86 20:44:51
3 28 16 *0 0 9|0 0 32.6g 65.5g 1.01g 7 db:1.1% 0 0|0 1|0 11k 62k 86 20:44:52
*0 9 4 *0 0 8|0 0 32.6g 65.5g 1022m 1 db:0.4% 0 0|0 0|0 3k 6k 87 20:44:53
insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time
3 107 34 *0 0 6|0 0 32.6g 65.5g 1.02g 1 db:1.1% 0 0|0 0|0 23k 107k 87 20:44:54
4 65 37 *0 0 8|0 0 32.6g 65.5g 2.69g 57 db:6.2% 0 0|0 0|0 24k 126k 87 20:44:55
9 84 45 *0 0 8|0 0 32.6g 65.5g 2.63g 17 db:5.3% 0 0|0 1|0 32k 109k 87 20:44:56
4 84 47 *0 0 44|0 0 32.6g 65.5g 1.89g 10 db:5.9% 0 0|0 1|0 30k 146k 86 20:44:57
3 73 32 *0 0 9|0 0 32.6g 65.5g 2.58g 12 db:4.7% 0 0|0 0|0 20k 112k 86 20:44:58
2 165 48 *0 0 7|0 0 32.6g 65.5g 2.62g 7 db:1.3% 0 0|0 0|0 34k 147k 86 20:44:59
3 61 26 *0 0 12|0 0 32.6g 65.5g 2.2g 6 db:4.7% 0 0|0 1|0 19k 73k 86 20:45:00
3 252 64 *0 0 12|0 0 32.6g 65.5g 1.87g 85 db:3.2% 0 0|0 0|0 52k 328k 86 20:45:01
*0 189 40 *0 0 6|0 0 32.6g 65.5g 1.65g 0 db:1.6% 0 0|0 0|0 33k 145k 87 20:45:02
1 18 10 *0 0 5|0 0 32.6g 65.5g 1.55g 3 db:0.9% 0 0|0 0|0 6k 15k 87 20:45:03
insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time
1 50 11 *0 0 6|0 0 32.6g 65.5g 1.57g 6 db:0.8% 0 0|0 0|0 9k 63k 87 20:45:04
2 49 16 *0 0 6|0 0 32.6g 65.5g 1.56g 1 db:1.1% 0 0|0 0|0 12k 50k 87 20:45:05
1 35 11 *0 0 7|0 0 32.6g 65.5g 1.58g 1 db:0.9% 0 0|0 0|0 8k 41k 87 20:45:06
*0 18 2 *0 0 42|0 0 32.6g 65.5g 1.55g 0 db:0.4% 0 0|0 0|0 5k 19k 86 20:45:07
6 75 40 *0 0 11|0 0 32.6g 65.5g 1.56g 10 db:1.9% 0 0|0 0|0 27k 89k 86 20:45:08
6 60 35 *0 0 7|0 0 32.6g 65.5g 1.89g 5 db:1.5% 0 0|0 1|0 23k 101k 86 20:45:09
2 17 14 *0 0 7|0 0 32.6g 65.5g 1.9g 0 db:1.3% 0 0|0 1|0 8k 29k 86 20:45:10
2 35 7 *0 0 4|0 0 32.6g 65.5g 1.77g 1 db:1.3% 0 0|0 0|0 7k 60k 86 20:45:12
4 50 28 *0 0 10|0 0 32.6g 65.5g 1.75g 10 db:2.0% 0 0|0 0|0 19k 79k 87 20:45:13
*0 3 1 *0 0 5|0 0 32.6g 65.5g 1.63g 0 .:0.7% 0 0|0 0|0 1k 4k 87 20:45:14
insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time
5 77 35 *0 0 8|0 0 32.6g 65.5g 1.7g 13 db:3.0% 0 0|0 0|0 23k 124k 88 20:45:15
3 35 18 *0 0 7|0 0 32.6g 65.5g 1.7g 5 db:0.8% 0 0|0 0|0 12k 43k 87 20:45:16
1 18 5 *0 0 11|0 0 32.6g 65.5g 1.63g 2 db:0.9% 0 0|0 0|0 5k 35k 87 20:45:17
3 33 21 *0 0 5|0 0 32.6g 65.5g 1.64g 3 db:0.8% 0 0|0 0|0 13k 32k 87 20:45:18
*0 25 4 *0 0 42|0 0 32.6g 65.5g 1.64g 0 db:0.3% 0 0|0 0|0 5k 34k 86 20:45:19
1 25 5 *0 0 5|0 0 32.6g 65.5g 1.65g 3 db:0.2% 0 0|0 0|0 5k 24k 86 20:45:20
12 88 65 *0 0 7|0 0 32.6g 65.5g 1.7g 25 db:4.2% 0 0|0 0|0 42k 121k 86 20:45:21
2 53 17 *0 0 4|0 0 32.6g 65.5g 1.65g 2 db:1.5% 0 0|0 0|0 12k 82k 86 20:45:22
1 9 6 *0 0 7|0 0 32.6g 65.5g 1.64g 1 db:1.0% 0 0|0 0|0 4k 13k 86 20:45:23
*0 6 2 *0 0 7|0 0 32.6g 65.5g 1.63g 0 db:0.1% 0 0|0 0|0 1k 5k 87 20:45:24
Set Replika: Diperbarui pada 15 Mei 2016
Kami memigrasikan contoh mandiri kami ke set replika. 2 sekunder melayani membaca dan 1 primer mengerjakan penulisan. Semua mesin di snapshot set area replika dari mesin asli. Apa yang terjadi dengan konfigurasi baru ini adalah bahwa masalah berubah dan lebih sulit untuk dideteksi.
Ini terjadi lebih jarang tetapi alih-alih koneksi dan antrian meroket, seluruh replika berhenti membaca / menulis, tanpa koneksi tinggi, tanpa antrian tanpa operasi mahal sama sekali. Semua permintaan ke DB hanya time out. Untuk memperbaiki masalah ini, SIGKILL ke proses mongodb harus dikirim ke ketiga mesin.