Usando o método descrito aqui para medir o tempo de resposta do servidor, posso ver que time_appconnect , time_pretransfer , e time_starttransfer são extremamente altos, mas apenas ao acessar o site por meio de HTTPS.
Por comparação, conectar-se ao Google é muito rápido.
curl -w "@curl-format.txt" -o /dev/null -s "https://www.google.com"
retorna
time_namelookup: 0.014433
time_connect: 0.117187
time_appconnect: 0.374567
time_pretransfer: 0.374779
time_redirect: 0.000000
time_starttransfer: 0.513398
----------
time_total: 0.514880
Conectar-se ao nosso site através de HTTP também é bastante rápido:
curl -w "@curl-format.txt" -o /dev/null -s "http://environmentaldashboard.org"
retorna
time_namelookup: 0.004136
time_connect: 0.044469
time_appconnect: 0.000000
time_pretransfer: 0.044554
time_redirect: 0.000000
time_starttransfer: 0.166275
----------
time_total: 0.166404
Mas a conexão via HTTPS é muito lenta:
curl -w "@curl-format.txt" -o /dev/null -s "https://environmentaldashboard.org"
retorna
time_namelookup: 0.005211
time_connect: 0.057697
time_appconnect: 11.931837
time_pretransfer: 11.932075
time_redirect: 0.000000
time_starttransfer: 11.972374
----------
time_total: 12.009711
Como isso poderia ser? O problema começou sem alterações no código, tanto quanto eu posso dizer. Eu sou um sysadmin bastante novo - quais ferramentas posso usar para depurar esse problema? Como o problema parece estar relacionado ao SSL, é possível que o problema esteja na verdade com nossa autoridade de certificação (GoDaddy)? Ou o problema é mais provável de um erro de configuração do servidor?
Não tenho certeza se isso é relevante, mas esse é o arquivo do host virtual apache (ligeiramente abreviado) de environmentaldashboard.org:
<VirtualHost *:443>
ServerName environmentaldashboard.org
ServerAlias www.environmentaldashboard.org
SSLEngine on
SSLCertificateFile /etc/ssl/environmentaldashboard.org/environmentaldashboard.org.crt
SSLCertificateKeyFile /etc/ssl/environmentaldashboard.org/environmentaldashboard.org.key
SSLCACertificateFile /etc/ssl/environmentaldashboard.org/intermediate.crt
ServerAdmin [email protected]
DocumentRoot /var/www/environmentaldashboard.org/
ErrorDocument 404 /404.php
RewriteEngine On
<Directory /var/www/>
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule !.*\.php$ %{REQUEST_FILENAME}.php [QSA,L]
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
<VirtualHost *:80>
ServerName environmentaldashboard.org
ServerAlias www.environmentaldashboard.org
Redirect permanent / https://environmentaldashboard.org/
</VirtualHost>
EDITAR
grep -Ev '(rv_cron|15min|PHP Warning)' /var/log/apache2/error.log | tail -n10000
retorna isso: link
e
journalctl -xef | grep -Ev '(rv_cron|15min|buildingosd)'
retorna isso:
link
top -d 30 | head -n50 retorna:
top - 19:02:38 up 8:35, 1 user, load average: 1.71, 1.98, 2.08
Tasks: 281 total, 1 running, 280 sleeping, 0 stopped, 0 zombie
%Cpu(s): 27.9 us, 3.8 sy, 0.0 ni, 55.1 id, 6.5 wa, 0.0 hi, 1.6 si, 5.0 st
KiB Mem : 4046472 total, 1300152 free, 1373280 used, 1373040 buff/cache
KiB Swap: 0 total, 0 free, 0 used. 2336100 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
8736 www-data 20 0 386056 22976 12248 S 55.6 0.6 0:06.03 apache2
15772 root 20 0 256696 81752 7072 S 22.2 2.0 1:34.52 buildingosd
14534 root 20 0 279284 104372 7104 S 16.7 2.6 2:04.70 buildingosd
19708 root 20 0 40680 3736 3116 R 16.7 0.1 0:00.05 top
1340 mysql 20 0 1583808 395376 18808 S 5.6 9.8 87:05.74 mysqld
23451 www-data 20 0 384072 20896 12156 S 5.6 0.5 0:18.71 apache2
1 root 20 0 37760 5756 3956 S 0.0 0.1 0:10.64 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.02 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:05.22 ksoftirqd/0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
7 root 20 0 0 0 0 S 0.0 0.0 3:30.70 rcu_sched
8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh
9 root rt 0 0 0 0 S 0.0 0.0 0:00.13 migration/0
10 root rt 0 0 0 0 S 0.0 0.0 0:00.76 watchdog/0
11 root rt 0 0 0 0 S 0.0 0.0 0:00.91 watchdog/1
12 root rt 0 0 0 0 S 0.0 0.0 0:00.14 migration/1
13 root 20 0 0 0 0 S 0.0 0.0 1:13.13 ksoftirqd/1
15 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/1:0H
16 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kdevtmpfs
17 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 netns
18 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 perf
19 root 20 0 0 0 0 S 0.0 0.0 0:00.10 khungtaskd
20 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 writeback
21 root 25 5 0 0 0 S 0.0 0.0 0:00.00 ksmd
22 root 39 19 0 0 0 S 0.0 0.0 0:05.73 khugepaged
23 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 crypto
24 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kintegrityd
25 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
26 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kblockd
27 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 ata_sff
28 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 md
29 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 devfreq_wq
34 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kswapd0
35 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 vmstat
36 root 20 0 0 0 0 S 0.0 0.0 0:00.00 fsnotify_mark
37 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ecryptfs-kthrea
53 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kthrotld
54 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 acpi_thermal_pm
55 root 20 0 0 0 0 S 0.0 0.0 0:00.00 vballoon
56 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
57 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
58 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
59 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
aqui estão algumas pastas de top -d 30 como atualização:
- link
- link
- link
- link
- link
