Hello everyone,
I noticed today a possible issue with one of my VPSes.
It shows an abnormal value for dcachesize.
Current limits are as follows:
----------------------------------------------------------------
CT 103 | HELD Bar% Lim%| MAXH Bar% Lim%| BAR | LIM | FAIL
-------------+---------------+---------------+-----+-----+------
kmemsize|10.5G - - |15.5G - - | - | - | -
lockedpages| - - - | 20K - - | - | - | -
privvmpages| 249M - - |1.28G - - | - | - | -
shmpages|92.9M - - | 151M - - | - | - | -
numproc| 32 - - | 75 - - | - | - | -
physpages|11.2G - 70%| 16G - 100%| - | 16G| -
vmguarpages| - - - | - - - | - | - | -
oomguarpages| 147M - - | 262M - - | - | - | -
numtcpsock| 14 - - | 117 - - | - | - | -
numflock| 2 - - | 39 - - | - | - | -
numpty| - - - | 3 - - | - | - | -
numsiginfo| - - - | 27 - - | - | - | -
tcpsndbuf| 553K - - |4.23M - - | - | - | -
tcprcvbuf|2.16M - - |26.6M - - | - | - | -
othersockbuf|27.1K - - |1.05M - - | - | - | -
dgramrcvbuf| - - - |9.03K - - | - | - | -
numothersock| 59 - - | 129 - - | - | - | -
dcachesize|10.5G - - |15.5G - - | - | - | -
numfile|1.53K - - |1.94K - - | - | - | -
numiptent| 24 - - | 24 - - | - | - | -
swappages|3.81M - 0.2%| 126M - 6%| - | 2G| -
----------------------------------------------------------------
There are no failcnts and the machine is up and running for a month now. Restarting the web and php-fpm servers didn't do much to lower the value. Is this metric supposed to stay that way all the time or it does decrease automatically?
Looking at open files usage I don't see something which accounts for that high of a value.
Currently running the following kernel on the host:
Linux CentOS-64-64-minimal 2.6.32-042stab081.5 #1 SMP Mon Sep 30 16:52:24 MSK 2013 x86_64 x86_64 x86_64 GNU/Linux
Mon Nov 25 15:31:41 2013 ftop 1.0
Processes: 24 total, 1 unreadable Press h for help, o for options
Open Files: 35 regular, 0 dir, 53 chr, 0 blk, 22 pipe, 67 sock, 17 misc
_ PID #FD USER COMMAND
-- 10882 17 root nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.confnginx: worker process
| +- err --W -- 0/0 /var/log/nginx/error.log (fd 4 for PID 10882)
| +- 4 --W -- 0/0 /var/log/nginx/error.log (stderr from PID 10882)
| +- 5 --W >- 141626/141626 /var/log/nginx/access.log (fd 5 for PID 10883)
| +- 6 --W -- 442029/442029 /var/log/nginx/website/access.log (fd 6 for PID 10883)
| +- 7 --W -- 40.3M/0 /var/log/nginx/website/error.log (fd 7 for PID 10883)
-- 10883 15 nginx nginx: worker process
| +- err --W -- 0/0 /var/log/nginx/error.log (stderr from PID 10882)
| +- 4 --W -- 0/0 /var/log/nginx/error.log (stderr from PID 10882)
| +- 5 --W >- 141626/141626 /var/log/nginx/access.log (fd 5 for PID 10882)
| +- 6 --W -- 442029/442029 /var/log/nginx/website/access.log (fd 6 for PID 10882)
| +- 7 --W -- 40.3M/0 /var/log/nginx/website/error.log (fd 7 for PID 10882)
-- 10884 15 nginx nginx: worker process
| +- err --W -- 0/0 /var/log/nginx/error.log (stderr from PID 10882)
| +- 4 --W -- 0/0 /var/log/nginx/error.log (stderr from PID 10882)
| +- 5 --W >- 141626/141626 /var/log/nginx/access.log (fd 5 for PID 10882)
| +- 6 --W -- 442029/442029 /var/log/nginx/website/access.log (fd 6 for PID 10882)
| +- 7 --W -- 40.3M/0 /var/log/nginx/website/error.log (fd 7 for PID 10882)
-- 10885 15 nginx nginx: worker process
| +- err --W -- 0/0 /var/log/nginx/error.log (stderr from PID 10882)
| +- 4 --W -- 0/0 /var/log/nginx/error.log (stderr from PID 10882)
| +- 5 --W >- 141626/141626 /var/log/nginx/access.log (fd 5 for PID 10882)
| +- 6 --W -- 442029/442029 /var/log/nginx/website/access.log (fd 6 for PID 10882)
| +- 7 --W -- 40.3M/0 /var/log/nginx/website/error.log (fd 7 for PID 10882)
-- 10887 15 nginx nginx: worker process
| +- err --W -- 0/0 /var/log/nginx/error.log (stderr from PID 10882)
| +- 4 --W -- 0/0 /var/log/nginx/error.log (stderr from PID 10882)
| +- 5 --W >- 141626/141626 /var/log/nginx/access.log (fd 5 for PID 10882)
| +- 6 --W -- 442029/442029 /var/log/nginx/website/access.log (fd 6 for PID 10882)
| +- 7 --W -- 40.3M/0 /var/log/nginx/website/error.log (fd 7 for PID 10882)
-- 119 10 root /sbin/udevd -d
| +- 10 -rw -- 1053/1053 /dev/.udev/queue.bin
-- 401 5 root /sbin/rsyslogd -i /var/run/syslogd.pid -c 5
| +- out --W -- 206/206 /var/log/messages
| +- err --W -- 9927/9927 /var/log/cron
| +- 3 -r- -- 0/0 /proc/kmsg
| +- 4 --W -- 6103/6103 /var/log/secure
-- 438 6 root sendmail: accepting connectionssendmail: Queue runner@01:00:00 for /var/spool/clientmqueuecrond
| +- 5 --w -- 32/32 /var/run/sendmail.pid
-- 446 5 smmsp sendmail: Queue runner@01:00:00 for /var/spool/clientmqueuecrond
| +- 4 --w -- 48/48 /var/run/sm-client.pid
-- 473 6 root crond
| +- 3 -rw -- 4/4 /var/run/crond.pid
-- 10904 11 root php-fpm: master process (/etc/php-fpm.conf)sshd: app [priv]
+- err --W -- 2052/2052 /var/log/php-fpm/error.log (fd 5 for PID 10904)
+- 5 --W -- 2052/2052 /var/log/php-fpm/error.log (stderr from PID 10904)
No zombie processes that hold open files.
[root@app /]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/ploop46926p1 20G 8.3G 11G 44% /
none 3.0G 4.0K 3.0G 1% /dev
[root@app /]# df -i
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/ploop46926p1 1282560 144098 1138462 12% /
none 786432 151 786281 1% /dev
I'm nowhere near the available free space in the VPS.
[root@CentOS-64-64-minimal conf]# vzcfgvalidate 103.conf
Validation completed: success
VPS is running CentOS 6.4 just like the host system. Is this an OpenVZ matter or the guest system is caching more files than I would like?
Any help is appreciated.
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