I left the config processes=2 threads=5 from about 12:00pm ET -> 1:40pm ET
and the capacity analysis and app reports showed lots of request queueing
and really, really bad performance. During that time apache memory usage
climbed from 140M-180M in NR's server monitor. Going to try flipping
processes/threads around. Setting processes=5 threads=2 at 1:40pm ET.
Request queuing immediately stopped and after the apache restart apache
reports 300MB of memory usage. htop reports 30 threads. It looks like each
process has 6 threads, when sorting by VIRT, they're all grouped together.
There are 5 groups of 6, so I'm not sure how threads=2 is controlling
anything. Each process looks like it's consuming 130M-160M of memory. Not
sure why these processes don't show up on the NR server monitor report as
mod_wsgi, or why I can't differentiate them from apache2
(https://rpm.newrelic.com/accounts/67402/servers/1130000/processes#id=152494639).
PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command
20212 www-data 20 0 136M 64604 4664 S 0.0 0.8 0:00.00 mod-wsgi
-k start
20213 www-data 20 0 136M 64604 4664 S 0.0 0.8 0:00.14 mod-wsgi
-k start
20214 www-data 20 0 136M 64604 4664 S 51.0 0.8 1:14.28 mod-wsgi
-k start
20215 www-data 20 0 136M 64604 4664 S 33.0 0.8 1:18.60 mod-wsgi
-k start
20240 www-data 20 0 136M 64604 4664 S 1.0 0.8 0:03.85 mod-wsgi
-k start
20179 www-data 20 0 136M 64604 4664 S 86.0 0.8 2:39.99 mod-wsgi
-k start
20203 www-data 20 0 131M 61340 4672 S 0.0 0.7 0:00.00 mod-wsgi
-k start
20204 www-data 20 0 131M 61340 4672 S 0.0 0.7 0:00.26 mod-wsgi
-k start
20205 www-data 20 0 131M 61340 4672 S 19.0 0.7 1:21.73 mod-wsgi
-k start
20206 www-data 20 0 131M 61340 4672 S 26.0 0.7 1:23.35 mod-wsgi
-k start
20207 www-data 20 0 131M 61340 4672 S 0.0 0.7 0:04.20 mod-wsgi
-k start
20177 www-data 20 0 131M 61340 4672 S 46.0 0.7 2:52.40 mod-wsgi
-k start
20196 www-data 20 0 131M 59552 4668 S 0.0 0.7 0:00.00 mod-wsgi
-k start
20197 www-data 20 0 131M 59552 4668 S 0.0 0.7 0:00.16 mod-wsgi
-k start
20198 www-data 20 0 131M 59552 4668 S 13.0 0.7 1:16.92 mod-wsgi
-k start
20199 www-data 20 0 131M 59552 4668 S 16.0 0.7 1:14.32 mod-wsgi
-k start
20200 www-data 20 0 131M 59552 4668 S 0.0 0.7 0:03.91 mod-wsgi
-k start
20175 www-data 20 0 131M 59552 4668 S 30.0 0.7 2:38.28 mod-wsgi
-k start
20227 www-data 20 0 130M 60680 4664 S 0.0 0.7 0:00.00 mod-wsgi
-k start
20228 www-data 20 0 130M 60680 4664 S 0.0 0.7 0:00.22 mod-wsgi
-k start
20229 www-data 20 0 130M 60680 4664 S 14.0 0.7 1:22.35 mod-wsgi
-k start
20230 www-data 20 0 130M 60680 4664 S 12.0 0.7 1:23.82 mod-wsgi
-k start
20241 www-data 20 0 130M 60680 4664 S 0.0 0.7 0:04.09 mod-wsgi
-k start
20178 www-data 20 0 130M 60680 4664 S 28.0 0.7 2:53.50 mod-wsgi
-k start
20188 www-data 20 0 132M 61232 4672 S 0.0 0.7 0:00.00 mod-wsgi
-k start
20189 www-data 20 0 132M 61232 4672 S 0.0 0.7 0:00.17 mod-wsgi
-k start
20190 www-data 20 0 132M 61232 4672 S 45.0 0.7 1:14.18 mod-wsgi
-k start
20191 www-data 20 0 132M 61232 4672 S 75.0 0.7 1:25.57 mod-wsgi
-k start
20192 www-data 20 0 132M 61232 4672 S 1.0 0.7 0:04.33 mod-wsgi
-k start
20176 www-data 20 0 132M 61232 4672 S 122. 0.7 2:47.90 mod-wsgi
-k start
On Wednesday, February 19, 2014 12:05:56 PM UTC-5, scoopseven wrote:
>
> This question started on SO:
> http://serverfault.com/questions/576527/apache-processes-in-top-more-than-maxclients/576600
>
> I've updated my Apache config and mod_wsgi settings, but am still
> experiencing memory creep. Here's my site conf and my apache2.conf:
>
> WSGIDaemonProcess mywsgi user=www-data group=www-data processes=5
> threads=5 display-name=mod-wsgi
> python-path=/home/admin/.virtualenvs/django/lib/python2.7/site-packages
> WSGIPythonHome /home/admin/.virtualenvs/django
> WSGIRestrictEmbedded On
> WSGILazyInitialization On
>
> <VirtualHost 127.0.0.1:8080>
> ServerName www.mysite.com
> DocumentRoot /srv/mysite
>
> SetEnvIf X-Forwarded-Protocol https HTTPS=1
> WSGIScriptAlias / /srv/mysite/system/apache/django.wsgi
> process-group= mywsgi application-group=%{GLOBAL}
> RequestHeader add X-Queue-Start "%t"
> </VirtualHost>
>
> <IfModule mpm_worker_module>
> StartServers 1
> ThreadsPerChild 5
> MinSpareThreads 5
> MaxSpareThreads 10
> MaxClients 25
> ServerLimit 5
> MaxRequestsPerChild 0
> MaxMemFree 1024
> </IfModule>
>
> I'm watching apache and mod_wsgi via htop and apache seems to be playing
> by the rules, never loading more than 25 threads. It usually stays around
> 10-15 threads. We average around 5-6 requests/second monitored by
> /server-status/. The thing that's bothering me is that I'm counting 44
> mod_wsgi threads in htop. I assumed that since I had processes=5 threads=5
> I would only see a maximum of 30 threads below (5 processes + 25 threads).
>
> Partial htop dump:
>
> 2249 www-data 20 0 159M 65544 4676 S 26.0 0.8 2:09.93 mod-wsgi
> -k start
> 2248 www-data 20 0 164M 69040 5560 S 148. 0.8 2:10.72 mod-wsgi
> -k start
> 2274 www-data 20 0 159M 65544 4676 S 0.0 0.8 0:12.58 mod-wsgi
> -k start
> 2250 www-data 20 0 157M 62212 5168 S 10.0 0.7 1:50.35 mod-wsgi
> -k start
> 2291 www-data 20 0 164M 69040 5560 S 41.0 0.8 0:17.07 mod-wsgi
> -k start
> 2251 www-data 20 0 165M 69320 4676 S 0.0 0.8 1:59.48 mod-wsgi
> -k start
> 2272 www-data 20 0 159M 65544 4676 S 0.0 0.8 0:28.67 mod-wsgi
> -k start
> 2282 www-data 20 0 165M 69320 4676 S 0.0 0.8 0:33.85 mod-wsgi
> -k start
> 2292 www-data 20 0 164M 69040 5560 S 28.0 0.8 0:28.08 mod-wsgi
> -k start
> 2298 www-data 20 0 157M 62212 5168 S 0.0 0.7 0:14.93 mod-wsgi
> -k start
> 2299 www-data 20 0 157M 62212 5168 S 1.0 0.7 0:23.71 mod-wsgi
> -k start
> 2358 www-data 20 0 164M 69040 5560 S 1.0 0.8 0:02.62 mod-wsgi
> -k start
> 2252 www-data 20 0 165M 70468 4660 S 41.0 0.8 1:55.85 mod-wsgi
> -k start
> 2273 www-data 20 0 159M 65544 4676 S 10.0 0.8 0:29.03 mod-wsgi
> -k start
> 2278 www-data 20 0 159M 65544 4676 S 1.0 0.8 0:02.79 mod-wsgi
> -k start
> 2264 www-data 20 0 165M 70468 4660 S 0.0 0.8 0:07.50 mod-wsgi
> -k start
> 2266 www-data 20 0 165M 70468 4660 S 25.0 0.8 0:39.49 mod-wsgi
> -k start
> 2300 www-data 20 0 157M 62212 5168 S 6.0 0.7 0:28.78 mod-wsgi
> -k start
> 2265 www-data 20 0 165M 70468 4660 S 15.0 0.8 0:31.44 mod-wsgi
> -k start
> 2294 www-data 20 0 164M 69040 5560 R 54.0 0.8 0:34.82 mod-wsgi
> -k start
> 2279 www-data 20 0 165M 69320 4676 S 0.0 0.8 0:32.63 mod-wsgi
> -k start
> 2297 www-data 20 0 157M 62212 5168 S 3.0 0.7 0:09.68 mod-wsgi
> -k start
> 2302 www-data 20 0 157M 62212 5168 S 0.0 0.7 0:27.62 mod-wsgi
> -k start
> 2323 www-data 20 0 157M 62212 5168 S 0.0 0.7 0:02.56 mod-wsgi
> -k start
> 2280 www-data 20 0 165M 69320 4676 S 0.0 0.8 0:13.00 mod-wsgi
> -k start
> 2263 www-data 20 0 165M 70468 4660 S 0.0 0.8 0:19.35 mod-wsgi
> -k start
> 2322 www-data 20 0 165M 69320 4676 S 0.0 0.8 0:03.05 mod-wsgi
> -k start
> 2275 www-data 20 0 165M 70468 4660 S 0.0 0.8 0:02.72 mod-wsgi
> -k start
> 2285 www-data 20 0 164M 69040 5560 S 0.0 0.8 0:00.00 mod-wsgi
> -k start
> 2288 www-data 20 0 164M 69040 5560 S 0.0 0.8 0:00.11 mod-wsgi
> -k start
> 2290 www-data 20 0 164M 69040 5560 S 4.0 0.8 0:15.66 mod-wsgi
> -k start
> 2293 www-data 20 0 164M 69040 5560 S 20.0 0.8 0:29.01 mod-wsgi
> -k start
> 2268 www-data 20 0 159M 65544 4676 S 0.0 0.8 0:00.00 mod-wsgi
> -k start
> 2269 www-data 20 0 159M 65544 4676 S 0.0 0.8 0:00.11 mod-wsgi
> -k start
> 2270 www-data 20 0 159M 65544 4676 S 15.0 0.8 0:26.62 mod-wsgi
> -k start
> 2271 www-data 20 0 159M 65544 4676 S 0.0 0.8 0:26.55 mod-wsgi
> -k start
>
> Last night I had processes=3 threads=3 and my NR capacity report reported
> 100% usage (
> https://rpm.newrelic.com/accounts/67402/applications/1132078/optimize/capacity_analysis),
>
> so I upped it to processes=5 threads=5 and now I have 44 threads going.
> Despite the instance count reported by NR staying relatively stable, memory
> consumption continues to increase (
> https://rpm.newrelic.com/accounts/67402/servers/1130000/processes#id=152494639).
>
> I realize that nobody except for Graham can see those NR reports, sorry.
>
> Has anyone dealt with this situation before?
>
> Mark
>
>
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