nginx workers stack at 100% usage after X random daysWhat sort of web server hardware do you use to handle 100 Mbps+ of static files?Requests per second slower when using nginx for load balancingWindows 2003/2008 terminal server, Application using 95-100% CPU when crashed, auto kill process?Trying to find bottleneck… 60k onsite visitorsNginx + Apache server crash every 6 daysnginx can't execute many requestsNginx and passenger request timeout (nginx status code 499)Nginx failed space when uploadHow to diagnose process at 100% CPU without being able to shell in?Fine tune Nginx & PHP FPM
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nginx workers stack at 100% usage after X random days
What sort of web server hardware do you use to handle 100 Mbps+ of static files?Requests per second slower when using nginx for load balancingWindows 2003/2008 terminal server, Application using 95-100% CPU when crashed, auto kill process?Trying to find bottleneck… 60k onsite visitorsNginx + Apache server crash every 6 daysnginx can't execute many requestsNginx and passenger request timeout (nginx status code 499)Nginx failed space when uploadHow to diagnose process at 100% CPU without being able to shell in?Fine tune Nginx & PHP FPM
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;
I am facing a strange incident, under which my two nginx workers suddenly get stack at 100% of CPU usage after a random number of days and at the same web traffic, under which they are behaving fine during the other days.
It serves a light traffic of 5concurrent requests per second and my nginx worker's config is set as follow:
user www-data;
worker_processes auto;
worker_cpu_affinity auto;
worker_rlimit_nofile 100000;
pid /run/nginx.pid;
pcre_jit on;
events
multi_accept on;
worker_connections 2048;
accept_mutex on;
use epoll;
No matter if I change the processes to auto or to a static amount (i've tried 1), i get a 100% starting after ~6 days. Here is a screenshot of my current htop: screenshot
If i restart my nginx service, load will return to normal. After 5-6 days, it will hit 100% again.
I've tried usign tools like ngxtop, but I am not able to identify the real cause of the load, but only to verify that this is not happening from a website source.
I've also restarted php7.3-fpm and nginx's CPU usage is still 100%, which means to mean that something else is going wrong.
Im not aware of any debugging tools for such a case and I would be thankful in advance if you can guide me on the proper tools in order to debug it.
Helpful information:
I am using WordOps ready-made stack script.
Nginx is on version 1.14.2
nginx cpu-usage troubleshooting
asked May 4 at 13:28
JohnnyBratsoniJohnnyBratsoni
1
add a comment |
I am facing a strange incident, under which my two nginx workers suddenly get stack at 100% of CPU usage after a random number of days and at the same web traffic, under which they are behaving fine during the other days.
It serves a light traffic of 5concurrent requests per second and my nginx worker's config is set as follow:
user www-data;
worker_processes auto;
worker_cpu_affinity auto;
worker_rlimit_nofile 100000;
pid /run/nginx.pid;
pcre_jit on;
events
multi_accept on;
worker_connections 2048;
accept_mutex on;
use epoll;
No matter if I change the processes to auto or to a static amount (i've tried 1), i get a 100% starting after ~6 days. Here is a screenshot of my current htop: screenshot
If i restart my nginx service, load will return to normal. After 5-6 days, it will hit 100% again.
I've tried usign tools like ngxtop, but I am not able to identify the real cause of the load, but only to verify that this is not happening from a website source.
I've also restarted php7.3-fpm and nginx's CPU usage is still 100%, which means to mean that something else is going wrong.
Im not aware of any debugging tools for such a case and I would be thankful in advance if you can guide me on the proper tools in order to debug it.
Helpful information:
I am using WordOps ready-made stack script.
Nginx is on version 1.14.2
nginx cpu-usage troubleshooting
asked May 4 at 13:28
JohnnyBratsoniJohnnyBratsoni
1
What operating system, Linux?
– John Mahowald
May 4 at 22:00
strace. Orgdbif you're feeling adventurous.
– womble♦
May 5 at 2:06
add a comment |
I am facing a strange incident, under which my two nginx workers suddenly get stack at 100% of CPU usage after a random number of days and at the same web traffic, under which they are behaving fine during the other days.
It serves a light traffic of 5concurrent requests per second and my nginx worker's config is set as follow:
user www-data;
worker_processes auto;
worker_cpu_affinity auto;
worker_rlimit_nofile 100000;
pid /run/nginx.pid;
pcre_jit on;
events
multi_accept on;
worker_connections 2048;
accept_mutex on;
use epoll;
No matter if I change the processes to auto or to a static amount (i've tried 1), i get a 100% starting after ~6 days. Here is a screenshot of my current htop: screenshot
If i restart my nginx service, load will return to normal. After 5-6 days, it will hit 100% again.
I've tried usign tools like ngxtop, but I am not able to identify the real cause of the load, but only to verify that this is not happening from a website source.
I've also restarted php7.3-fpm and nginx's CPU usage is still 100%, which means to mean that something else is going wrong.
Im not aware of any debugging tools for such a case and I would be thankful in advance if you can guide me on the proper tools in order to debug it.
Helpful information:
I am using WordOps ready-made stack script.
Nginx is on version 1.14.2
nginx cpu-usage troubleshooting
asked May 4 at 13:28
JohnnyBratsoniJohnnyBratsoni
1
I am facing a strange incident, under which my two nginx workers suddenly get stack at 100% of CPU usage after a random number of days and at the same web traffic, under which they are behaving fine during the other days.
It serves a light traffic of 5concurrent requests per second and my nginx worker's config is set as follow:
user www-data;
worker_processes auto;
worker_cpu_affinity auto;
worker_rlimit_nofile 100000;
pid /run/nginx.pid;
pcre_jit on;
events
multi_accept on;
worker_connections 2048;
accept_mutex on;
use epoll;
No matter if I change the processes to auto or to a static amount (i've tried 1), i get a 100% starting after ~6 days. Here is a screenshot of my current htop: screenshot
If i restart my nginx service, load will return to normal. After 5-6 days, it will hit 100% again.
I've tried usign tools like ngxtop, but I am not able to identify the real cause of the load, but only to verify that this is not happening from a website source.
I've also restarted php7.3-fpm and nginx's CPU usage is still 100%, which means to mean that something else is going wrong.
Im not aware of any debugging tools for such a case and I would be thankful in advance if you can guide me on the proper tools in order to debug it.
Helpful information:
I am using WordOps ready-made stack script.
Nginx is on version 1.14.2
nginx cpu-usage troubleshooting
nginx cpu-usage troubleshooting
asked May 4 at 13:28
JohnnyBratsoniJohnnyBratsoni
1
asked May 4 at 13:28
JohnnyBratsoniJohnnyBratsoni
1
asked May 4 at 13:28
JohnnyBratsoniJohnnyBratsoni
1
asked May 4 at 13:28
JohnnyBratsoniJohnnyBratsoni
1
asked May 4 at 13:28
JohnnyBratsoniJohnnyBratsoni
1
1
What operating system, Linux?
– John Mahowald
May 4 at 22:00
strace. Orgdbif you're feeling adventurous.
– womble♦
May 5 at 2:06
add a comment |
What operating system, Linux?
– John Mahowald
May 4 at 22:00
strace. Orgdbif you're feeling adventurous.
– womble♦
May 5 at 2:06
What operating system, Linux?
– John Mahowald
May 4 at 22:00
What operating system, Linux?
– John Mahowald
May 4 at 22:00
strace. Or gdb if you're feeling adventurous.– womble♦
May 5 at 2:06
strace. Or gdb if you're feeling adventurous.– womble♦
May 5 at 2:06
add a comment |
1 Answer
1
active
oldest
votes
On Linux, it is easy to profile exactly what code is on CPU.
Install debug symbols of the kernel and your app (nginx) so you have human readable function names.
Run perf top to see the top symbols on CPU. perf_events reference
Generate a flame graph visualization using perf or bcc.
Review basic utilization with a handful of useful tools. Or look at netdata for the same thing.
uptime
dmesg | tail
vmstat 1
mpstat -P ALL 1
pidstat 1
iostat -xz 1
free -m
sar -n DEV 1
sar -n TCP,ETCP 1
top
Then the difficult part: determine what causes it. Could be app code (PHP?) could be web server (nginx) could be OS tuning (Linux). Get familiar with the entire stack and what it is doing.
answered May 5 at 11:46
John MahowaldJohn Mahowald
9,9841714
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
On Linux, it is easy to profile exactly what code is on CPU.
Install debug symbols of the kernel and your app (nginx) so you have human readable function names.
Run perf top to see the top symbols on CPU. perf_events reference
Generate a flame graph visualization using perf or bcc.
Review basic utilization with a handful of useful tools. Or look at netdata for the same thing.
uptime
dmesg | tail
vmstat 1
mpstat -P ALL 1
pidstat 1
iostat -xz 1
free -m
sar -n DEV 1
sar -n TCP,ETCP 1
top
Then the difficult part: determine what causes it. Could be app code (PHP?) could be web server (nginx) could be OS tuning (Linux). Get familiar with the entire stack and what it is doing.
answered May 5 at 11:46
John MahowaldJohn Mahowald
9,9841714
add a comment |
On Linux, it is easy to profile exactly what code is on CPU.
Install debug symbols of the kernel and your app (nginx) so you have human readable function names.
Run perf top to see the top symbols on CPU. perf_events reference
Generate a flame graph visualization using perf or bcc.
Review basic utilization with a handful of useful tools. Or look at netdata for the same thing.
uptime
dmesg | tail
vmstat 1
mpstat -P ALL 1
pidstat 1
iostat -xz 1
free -m
sar -n DEV 1
sar -n TCP,ETCP 1
top
Then the difficult part: determine what causes it. Could be app code (PHP?) could be web server (nginx) could be OS tuning (Linux). Get familiar with the entire stack and what it is doing.
answered May 5 at 11:46
John MahowaldJohn Mahowald
9,9841714
add a comment |
On Linux, it is easy to profile exactly what code is on CPU.
Install debug symbols of the kernel and your app (nginx) so you have human readable function names.
Run perf top to see the top symbols on CPU. perf_events reference
Generate a flame graph visualization using perf or bcc.
Review basic utilization with a handful of useful tools. Or look at netdata for the same thing.
uptime
dmesg | tail
vmstat 1
mpstat -P ALL 1
pidstat 1
iostat -xz 1
free -m
sar -n DEV 1
sar -n TCP,ETCP 1
top
Then the difficult part: determine what causes it. Could be app code (PHP?) could be web server (nginx) could be OS tuning (Linux). Get familiar with the entire stack and what it is doing.
answered May 5 at 11:46
John MahowaldJohn Mahowald
9,9841714
On Linux, it is easy to profile exactly what code is on CPU.
Install debug symbols of the kernel and your app (nginx) so you have human readable function names.
Run perf top to see the top symbols on CPU. perf_events reference
Generate a flame graph visualization using perf or bcc.
Review basic utilization with a handful of useful tools. Or look at netdata for the same thing.
uptime
dmesg | tail
vmstat 1
mpstat -P ALL 1
pidstat 1
iostat -xz 1
free -m
sar -n DEV 1
sar -n TCP,ETCP 1
top
Then the difficult part: determine what causes it. Could be app code (PHP?) could be web server (nginx) could be OS tuning (Linux). Get familiar with the entire stack and what it is doing.
answered May 5 at 11:46
John MahowaldJohn Mahowald
9,9841714
answered May 5 at 11:46
John MahowaldJohn Mahowald
9,9841714
answered May 5 at 11:46
John MahowaldJohn Mahowald
9,9841714
answered May 5 at 11:46
John MahowaldJohn Mahowald
9,9841714
9,9841714
add a comment |
add a comment |
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What operating system, Linux?
– John Mahowald
May 4 at 22:00
strace. Orgdbif you're feeling adventurous.– womble♦
May 5 at 2:06