서버는 EC2 인스턴스이며 HTTPD에서 NAS (NFS)에 파일을 저장하는 것을 의미합니다.
flush-0 : 32와 같은 프로세스는 CPU의 % 90 이상을 소비하고 평균로드는 65.50, 64.02, 66.59입니다.
그래프에 따르면, 4 개의 코어에서 초기로드 평균은 ~ 1.01, 2.02, 1.80입니다. Load Balancer에 다른 유사한 인스턴스를 추가했으며 CPU 사용률은 약 % 6 ATM입니다.
이러한 플러시 프로세스는 정확히 무엇을합니까?
클라이언트가 데이터를 작성하기 만하면 NFS 속성 캐시를 꺼야합니까?
패킷 조각화 때문일 수 있습니까?
통계는 다음과 같습니다 nfsstat -s -4.
=================================================================
Server 0:
Server rpc stats:
calls badcalls badauth badclnt xdrcall
715054137 0 0 0 0
Server nfs v4:
null compound
993 0% 715053143 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 143229323 6% 78092765 3% 36693816 1%
create delegpurge delegreturn getattr getfh link
3486926 0% 0 0% 0 0% 679872421 28% 158406682 6% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 95872524 4% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
78173920 3% 0 0% 46442107 1% 1668 0% 715044032 29% 0 0%
putrootfh read readdir readlink remove rename
7110 0% 42081145 1% 9116904 0% 0 0% 7026 0% 1257 0%
renew restorefh savefh secinfo setattr setcltid
14 0% 81591622 3% 81659244 3% 0 0% 21028018 0% 3244 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
3244 0% 0 0% 114086560 4% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 0 0% 0 0%
=================================================================
Server 1:
Server rpc stats:
calls badcalls badauth badclnt xdrcall
307172153 0 0 0 0
Server nfs v4:
null compound
427 0% 307171725 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 58451998 5% 32717934 3% 15557564 1%
create delegpurge delegreturn getattr getfh link
1424670 0% 0 0% 0 0% 291829363 28% 67959378 6% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 41790934 4% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
32741459 3% 0 0% 18993781 1% 75 0% 307167167 30% 0 0%
putrootfh read readdir readlink remove rename
3108 0% 18598329 1% 3892199 0% 0 0% 742 0% 2 0%
renew restorefh savefh secinfo setattr setcltid
3 0% 34142743 3% 34166131 3% 0 0% 8963430 0% 1449 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
1449 0% 0 0% 54628017 5% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 0 0% 0 0%
=================================================================
Server 2:
Server rpc stats:
calls badcalls badauth badclnt xdrcall
53026598 0 0 0 0
Server nfs v4:
null compound
89 0% 53026508 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 9605179 5% 5472897 3% 2633853 1%
create delegpurge delegreturn getattr getfh link
231276 0% 0 0% 0 0% 50395149 28% 11903036 6% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 7528324 4% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
5477948 3% 0 0% 2760996 1% 15 0% 53025580 30% 0 0%
putrootfh read readdir readlink remove rename
633 0% 3566001 2% 673466 0% 0 0% 11 0% 0 0%
renew restorefh savefh secinfo setattr setcltid
2 0% 5704253 3% 5709223 3% 0 0% 1526967 0% 292 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
292 0% 0 0% 10439844 5% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 0 0% 0 0%
=================================================================
Server 3:
Server rpc stats:
calls badcalls badauth badclnt xdrcall
63045403 0 0 0 0
Server nfs v4:
null compound
121 0% 63045280 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 11504749 5% 6504139 3% 3119453 1%
create delegpurge delegreturn getattr getfh link
271128 0% 0 0% 0 0% 59865633 28% 14058385 6% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 8852565 4% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
6521385 3% 0 0% 3365913 1% 15 0% 63043988 30% 0 0%
putrootfh read readdir readlink remove rename
874 0% 4209822 2% 791702 0% 0 0% 6 0% 0 0%
renew restorefh savefh secinfo setattr setcltid
9 0% 6775367 3% 6792509 3% 0 0% 1811226 0% 409 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
409 0% 0 0% 12368747 5% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 0 0% 0 0%
=================================================================
Server 4:
Server rpc stats:
calls badcalls badauth badclnt xdrcall
817288490 0 0 0 0
Server nfs v4:
null compound
1204 0% 817287285 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 164320609 6% 89471711 3% 42448842 1%
create delegpurge delegreturn getattr getfh link
4101436 0% 0 0% 0 0% 778155935 28% 180629867 6% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 109104313 4% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
89598740 3% 0 0% 53534516 1% 9727 0% 817288175 29% 0 0%
putrootfh read readdir readlink remove rename
8020 0% 46348481 1% 10773529 0% 0 0% 100880 0% 12342 0%
renew restorefh savefh secinfo setattr setcltid
80 0% 93709338 3% 93712518 3% 0 0% 24303185 0% 3352 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
3352 0% 0 0% 127464001 4% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 0 0% 0 0%
=================================================================
Server 5:
Server rpc stats:
calls badcalls badauth badclnt xdrcall
804660319 0 0 0 0
Server nfs v4:
null compound
1204 0% 804659114 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 161331719 6% 88318366 3% 41571552 1%
create delegpurge delegreturn getattr getfh link
4090384 0% 0 0% 0 0% 764533960 28% 177969216 6% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 107385644 4% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
88321805 3% 0 0% 54307425 2% 444 0% 804647492 29% 0 0%
putrootfh read readdir readlink remove rename
8353 0% 45980723 1% 10410930 0% 0 0% 88471 0% 440 0%
renew restorefh savefh secinfo setattr setcltid
21 0% 92410970 3% 92412629 3% 0 0% 23733174 0% 3688 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
3688 0% 0 0% 125268800 4% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 0 0% 0 0%
=================================================================
Server 6:
Server rpc stats:
calls badcalls badauth badclnt xdrcall
795385017 0 0 0 0
Server nfs v4:
null compound
1204 0% 795383812 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 158633282 5% 87331357 3% 41400927 1%
create delegpurge delegreturn getattr getfh link
4080179 0% 0 0% 0 0% 756063664 28% 176355823 6% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 106692513 4% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
87333398 3% 0 0% 53591273 2% 187 0% 795371861 29% 0 0%
putrootfh read readdir readlink remove rename
8367 0% 45030006 1% 10352133 0% 0 0% 80473 0% 151 0%
renew restorefh savefh secinfo setattr setcltid
28 0% 91411943 3% 91413728 3% 0 0% 23629833 0% 3707 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
3707 0% 0 0% 124033436 4% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 0 0% 0 0%
=================================================================
Server 7:
Server rpc stats:
calls badcalls badauth badclnt xdrcall
801916264 0 0 0 0
Server nfs v4:
null compound
1204 0% 801915059 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 161888929 6% 88285947 3% 41212864 1%
create delegpurge delegreturn getattr getfh link
4069479 0% 0 0% 0 0% 762072130 28% 177131560 6% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 106437411 3% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
88288337 3% 0 0% 54779036 2% 191 0% 801903449 29% 0 0%
putrootfh read readdir readlink remove rename
8225 0% 45488312 1% 10259565 0% 0 0% 76243 0% 177 0%
renew restorefh savefh secinfo setattr setcltid
4 0% 92355900 3% 92357993 3% 0 0% 23515286 0% 3558 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
3558 0% 0 0% 123741908 4% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 0 0% 0 0%
=================================================================
Server 8:
Server rpc stats:
calls badcalls badauth badclnt xdrcall
804732833 1 1 0 0
Server nfs v4:
null compound
1204 0% 804731628 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 161428939 6% 88340891 3% 41568432 1%
create delegpurge delegreturn getattr getfh link
4085332 0% 0 0% 0 0% 764396486 28% 177796853 6% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 107176837 3% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
88342790 3% 0 0% 54344886 2% 187 0% 804720008 29% 0 0%
putrootfh read readdir readlink remove rename
8226 0% 46219141 1% 10381361 0% 0 0% 83380 0% 160 0%
renew restorefh savefh secinfo setattr setcltid
0 0% 92426602 3% 92428282 3% 0 0% 23736349 0% 3554 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
3554 0% 0 0% 125088530 4% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 0 0% 0 0%
=================================================================
Server 9:
Server rpc stats:
calls badcalls badauth badclnt xdrcall
800961003 0 0 0 0
Server nfs v4:
null compound
1204 0% 800959798 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 161394704 6% 88264733 3% 41642226 1%
create delegpurge delegreturn getattr getfh link
4098314 0% 0 0% 0 0% 761225542 28% 172733291 6% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 102217363 3% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
88272429 3% 0 0% 53937975 2% 467 0% 800948292 30% 0 0%
putrootfh read readdir readlink remove rename
8312 0% 45893437 1% 10409370 0% 0 0% 83127 0% 478 0%
renew restorefh savefh secinfo setattr setcltid
35 0% 92369729 3% 92371221 3% 0 0% 23772628 0% 3637 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
3637 0% 0 0% 124997490 4% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 0 0% 0 0%
답변
플러시 프로세스는 더티 페이지의 파일 시스템에 대한 쓰기 저장을 관리합니다. CPU를 많이 차지해서는 안됩니다. 대부분의 시간은 디스크 (또는 NFS 용 네트워크 등)를 기다리는 데 소비됩니다. 플러시 프로세스에서 CPU 사용량이 높으면 커널 버그 일 수 있습니다. 재부팅을 시도하면 상태가 지워집니다.