ServersMan@VPS [Entry] 遅い原因

2015-12-092021-06-21

ServersMan@VPS Entryプランを2010年頃から借りてますが、WEBとかの表示が遅いです。特にWorePressの管理画面とかがひどいです。Apache,MySQLなどのチューニングしてもほとんど効果ない。
しかも、abコマンドの負荷テストなんか、タイムアウトだし・・・・ワンコインで借りているので仕方ないけど、ちょっとひどい；；

$ ab -n 10 -c 10 https://ex1.m-yabe.com/

This is ApacheBench, Version 2.3 <$Revision: 1430300 $>

Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking ex1.m-yabe.com (be patient)...apr_pollset_poll: The timeout specified has expired (70007)

$ ab -n 10 -c 10 https://ex1.m-yabe.com/ This is ApacheBench, Version 2.3 <$Revision: 1430300 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking ex1.m-yabe.com (be patient)...apr_pollset_poll: The timeout specified has expired (70007)

$ ab -n 10 -c 10 https://ex1.m-yabe.com/
This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking ex1.m-yabe.com (be patient)...apr_pollset_poll: The timeout specified has expired (70007)

ServersMan@VPSのサポートページを見ていると、下記のFAQがありシステムリソースの割り当てに失敗してないか確認してみてねて事
ServersMan@VPSで仮想マシンの動作が重い

cat /proc/user_beancountersを叩いて確認してみると下記のようになってます

$ sudo cat /proc/user_beancounters

Version: 2.5

uid resource held maxheld barrier limit failcnt

11161: kmemsize 418766545 939372544 9223372036854775807 9223372036854775807 0

lockedpages 0 0 256 256 0

privvmpages 237443 590836 9223372036854775807 9223372036854775807 0

shmpages 13932 15233 9223372036854775807 9223372036854775807 0

dummy 0 0 9223372036854775807 9223372036854775807 0

numproc 65 145 240 240 0

physpages 221088 262267 0 262144 0

vmguarpages 0 0 9223372036854775807 9223372036854775807 0

oomguarpages 60318 309746 26112 9223372036854775807 0

numtcpsock 8 181 360 360 0

numflock 7 19 188 206 0

numpty 1 2 8 8 0

numsiginfo 0 18 128 128 0

tcpsndbuf 141832 1733560 1720320 2703360 54991519

tcprcvbuf 131072 1738992 1720320 2703360 28671

othersockbuf 53176 876208 1126080 2097152 0

dgramrcvbuf 0 78480 262144 262144 0

numothersock 51 120 360 360 0

dcachesize 406746023 927924431 9223372036854775807 9223372036854775807 0

numfile 888 1800 9312 9312 0

dummy 0 0 9223372036854775807 9223372036854775807 0

numiptent 24 24 256 256 0

$ sudo cat /proc/user_beancounters Version: 2.5 uid resource held maxheld barrier limit failcnt 11161: kmemsize 418766545 939372544 9223372036854775807 9223372036854775807 0 lockedpages 0 0 256 256 0 privvmpages 237443 590836 9223372036854775807 9223372036854775807 0 shmpages 13932 15233 9223372036854775807 9223372036854775807 0 dummy 0 0 9223372036854775807 9223372036854775807 0 numproc 65 145 240 240 0 physpages 221088 262267 0 262144 0 vmguarpages 0 0 9223372036854775807 9223372036854775807 0 oomguarpages 60318 309746 26112 9223372036854775807 0 numtcpsock 8 181 360 360 0 numflock 7 19 188 206 0 numpty 1 2 8 8 0 numsiginfo 0 18 128 128 0 tcpsndbuf 141832 1733560 1720320 2703360 54991519 tcprcvbuf 131072 1738992 1720320 2703360 28671 othersockbuf 53176 876208 1126080 2097152 0 dgramrcvbuf 0 78480 262144 262144 0 numothersock 51 120 360 360 0 dcachesize 406746023 927924431 9223372036854775807 9223372036854775807 0 numfile 888 1800 9312 9312 0 dummy 0 0 9223372036854775807 9223372036854775807 0 dummy 0 0 9223372036854775807 9223372036854775807 0 dummy 0 0 9223372036854775807 9223372036854775807 0 numiptent 24 24 256 256 0

$ sudo cat /proc/user_beancounters
Version: 2.5
       uid  resource                     held              maxheld              barrier                limit              failcnt
    11161:  kmemsize                418766545            939372544  9223372036854775807  9223372036854775807                    0
            lockedpages                     0                    0                  256                  256                    0
            privvmpages                237443               590836  9223372036854775807  9223372036854775807                    0
            shmpages                    13932                15233  9223372036854775807  9223372036854775807                    0
            dummy                           0                    0  9223372036854775807  9223372036854775807                    0
            numproc                        65                  145                  240                  240                    0
            physpages                  221088               262267                    0               262144                    0
            vmguarpages                     0                    0  9223372036854775807  9223372036854775807                    0
            oomguarpages                60318               309746                26112  9223372036854775807                    0
            numtcpsock                      8                  181                  360                  360                    0
            numflock                        7                   19                  188                  206                    0
            numpty                          1                    2                    8                    8                    0
            numsiginfo                      0                   18                  128                  128                    0
            tcpsndbuf                  141832              1733560              1720320              2703360             54991519
            tcprcvbuf                  131072              1738992              1720320              2703360                28671
            othersockbuf                53176               876208              1126080              2097152                    0
            dgramrcvbuf                     0                78480               262144               262144                    0
            numothersock                   51                  120                  360                  360                    0
            dcachesize              406746023            927924431  9223372036854775807  9223372036854775807                    0
            numfile                       888                 1800                 9312                 9312                    0
            dummy                           0                    0  9223372036854775807  9223372036854775807                    0
            dummy                           0                    0  9223372036854775807  9223372036854775807                    0
            dummy                           0                    0  9223372036854775807  9223372036854775807                    0
            numiptent                      24                   24                  256                  256                    0

failcntの箇所を抜粋すると、カウントされています。

resource failcnt
tcpsndbuf 54991519
tcprcvbuf 28671
解決策が再起動て、サーバー運用では考え難いですが仕方なく再起動しました
この後、下記のFAQのある事象になってネットワークが接続できなくなって、サポートで対応してもらうまでネットワークが繋がらない状況になりました

serversMan@VPSのCentOSでinitscriptsの不具合で再起動すると外部からのアクセス不可 [CentOS 7]