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testall
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« on: June 19, 2007, 12:24:25 PM » |
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I found out the apache httpd use lots of memory in VPS, every connection takes about 5-6M memory.
the Lighttpd seems use less memory and runs faster than apache httpd, and it could to be installed to work with httpd at the same VPS.
anyone have tried it with Plesk?
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vivalite
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« Reply #1 on: June 19, 2007, 03:02:17 PM » |
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Don't think Plesk provide any Lighttpd module or support. BTW Apache is not as that bad as per say. Currently I am having 10 Apache processes running in background and the total memory cost is 11MB.
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testall
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« Reply #2 on: June 19, 2007, 04:35:30 PM » |
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Don't think Plesk provide any Lighttpd module or support. BTW Apache is not as that bad as per say. Currently I am having 10 Apache processes running in background and the total memory cost is 11MB.
really? your httpd only cost 1M for each thread?  If i using this simple test php file, and run it several instances, then we can find out memory usuage from vpsinfo.php: test.php ========= <? sleep(60); ?> # php test.php & # php test.php & # php test.php & # php test.php & # php test.php & for me , it costs 5M per thread.  |
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testall
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« Reply #3 on: June 19, 2007, 04:43:31 PM » |
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also i have noticed my VPS can only handle 40 concorrent connections, above that , mysql starts reporting memory error( 30 mysql connctions).
if there is no much load, the privvmpages is around 340M
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vivalite
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« Reply #4 on: June 19, 2007, 10:35:42 PM » |
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The RES column you see from linux top command means the total memory that process use. For example you see 14M means your httpd took 14MB memory in total.
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vivalite
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« Reply #5 on: June 19, 2007, 10:38:59 PM » |
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also i have noticed my VPS can only handle 40 concorrent connections, above that , mysql starts reporting memory error( 30 mysql connctions).
if there is no much load, the privvmpages is around 340M
you really have a busy site, I think dedicated server is more suit for you. |
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testall
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« Reply #6 on: June 20, 2007, 06:25:08 AM » |
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The RES column you see from linux top command means the total memory that process use. For example you see 14M means your httpd took 14MB memory in total.
from Top, i can see about 10 httpd Thread, RES columen from 12M to 21M, average is about 17M, does it mean each httpd thread use that much memory? that is way too much. |
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testall
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« Reply #7 on: June 20, 2007, 07:31:26 PM » |
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This is my "top" screen cut:
30510 mysql 15 0 115m 26m 4500 S 0 0.3 1:19.20 mysqld
3655 apache 15 0 45556 21m 14m S 1 0.3 0:18.57 httpd
32708 psaadm 15 0 44612 20m 12m S 0 0.3 0:00.39 httpsd
5636 apache 15 0 45548 20m 14m S 1 0.3 0:18.86 httpd
3330 apache 16 0 45588 19m 13m S 0 0.2 0:20.04 httpd
13776 apache 16 0 45524 19m 13m S 0 0.2 0:11.51 httpd
22108 apache 16 0 45996 19m 12m S 0 0.2 0:05.23 httpd
32627 psaadm 15 0 44812 18m 10m S 0 0.2 0:00.29 httpsd
23653 apache 15 0 45432 17m 11m S 0 0.2 0:03.93 httpd
18269 apache 16 0 44256 17m 12m S 0 0.2 0:06.84 httpd
26157 apache 15 0 44084 13m 8396 S 0 0.2 0:01.37 httpd
25998 apache 15 0 44036 12m 7840 S 0 0.2 0:01.56 httpd
28003 apache 16 0 44024 10m 5956 S 0 0.1 0:00.19 httpd
22368 root 15 0 42348 8884 5556 S 0 0.1 0:01.40 httpd
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vivalite
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« Reply #8 on: June 20, 2007, 08:51:49 PM » |
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looks like your apache dose take some more memory than mine. This one is mine: 8005 apache 16 0 34528 12m 3944 S 0 0.4 0:00.11 httpd 20020 apache 15 0 34512 12m 3940 S 0 0.4 0:00.04 httpd 20021 apache 15 0 34504 12m 3924 S 0 0.4 0:00.05 httpd 20022 apache 16 0 35124 12m 3960 S 0 0.4 0:00.09 httpd 20023 apache 15 0 34524 13m 5372 S 0 0.4 0:00.05 httpd 20024 apache 15 0 34476 12m 3748 S 0 0.4 0:00.03 httpd 20025 apache 15 0 34476 12m 3712 S 0 0.4 0:00.01 httpd 20026 apache 15 0 34656 13m 5192 S 0 0.4 0:00.02 httpd 20027 apache 15 0 34528 13m 5396 S 0 0.4 0:00.13 httpd Maybe unload unnecessary Apache/PHP module will help some? Here is my phpinfo: http://www.itamsdemo.com/phpinfo.phpany difference with yours? |
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perestrelka
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« Reply #9 on: June 21, 2007, 04:32:45 AM » |
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Hi Testall,
You may also consider unloading Apache modules you do not use.
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Kind Regards,
Vlad Artamonov
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testall
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« Reply #10 on: June 21, 2007, 08:51:03 AM » |
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my loaded Apache models is much less then vivalite's apache models.
the big difference i noticed is vivalite is using PHP 5.2, I am using 5.1.6( yum from centosplus ).
according php.net, php 5.2 has big improvement to the Memory Manager.
I don't know if this is the reason.
here is another post i searched from google:
On another server (Ubuntu) httpd processes take 15-20 Mb for Moodle, I have mostly the same modules except SSL and DAV. The PHP modules don't seem to matter that much, the test server has "everything" loaded on the PHP side, the "culprit" (SuSe Enterprise 9) server has less PHP modules, but it eats 35-40 Mb per process (physical memory, RES in "top").
I never had the time nor the expertise to find out what this was, but just reporting: we upgraded to Apache 2.2.3, PHP 5.2.0 and MySQL 5.0.27 (From 2.0, 4.1 and 4.1 respectively) and on the same server the top reports that httpd processes take <10M (RES) each, and almost half of that reported as shared (SHR) surprise
Must be a memory-model change somewhere deep in the system, but things seem to be running smoothly now so happy happy joy joy for us smile
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perestrelka
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« Reply #11 on: June 21, 2007, 09:56:37 PM » |
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my loaded Apache models is much less then vivalite's apache models.
the big difference i noticed is vivalite is using PHP 5.2, I am using 5.1.6( yum from centosplus ).
according php.net, php 5.2 has big improvement to the Memory Manager.
I don't know if this is the reason.
here is another post i searched from google:
On another server (Ubuntu) httpd processes take 15-20 Mb for Moodle, I have mostly the same modules except SSL and DAV. The PHP modules don't seem to matter that much, the test server has "everything" loaded on the PHP side, the "culprit" (SuSe Enterprise 9) server has less PHP modules, but it eats 35-40 Mb per process (physical memory, RES in "top").
I never had the time nor the expertise to find out what this was, but just reporting: we upgraded to Apache 2.2.3, PHP 5.2.0 and MySQL 5.0.27 (From 2.0, 4.1 and 4.1 respectively) and on the same server the top reports that httpd processes take <10M (RES) each, and almost half of that reported as shared (SHR) surprise
Must be a memory-model change somewhere deep in the system, but things seem to be running smoothly now so happy happy joy joy for us smile
The only way to check this is to try to upgrade  |
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Kind Regards,
Vlad Artamonov
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testall
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« Reply #12 on: June 21, 2007, 10:20:56 PM » |
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today i tried to reduce "MaxRequestsPerChild" = 15 in httpd.conf, which forces httpd thread to expire quickly, so the memory can be set to free quickly.
so far so good, the average RES is around 11M.
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perestrelka
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« Reply #13 on: June 23, 2007, 12:08:27 AM » |
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That's really awesome. Please let us know how it is going through the next week.
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Kind Regards,
Vlad Artamonov
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testall
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« Reply #14 on: June 23, 2007, 09:03:36 AM » |
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That's really awesome. Please let us know how it is going through the next week.
so far so good, the memory usuage is down about 80M. cpu usuage keeps health too. |
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