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Jérôme Vieilledent
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Monday 29 November 2010 8:01:04 am
Hi Hugo I guess that as long as your hosting architecture supports it, it is fine. However, you should be careful with database load, which might grow as queries can be longer and longer, especially if you use the default search engine and filtered fetches. My advise would be to use eZ Find for regular fetches and search as this will lighten your database a lot (no more complex queries DB, only fetch by node id from Solr filtered results). You should also make an extensive use of cache (view cache, cache blocks, static cache) and consider using a reverse proxy cache such as Varnish. With that your system would be more scalable :)
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Hugo Sandoval
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Monday 29 November 2010 8:17:52 am
Hi Hugo I guess that as long as your hosting architecture supports it, it is fine. However, you should be careful with database load, which might grow as queries can be longer and longer, especially if you use the default search engine and filtered fetches. My advise would be to use eZ Find for regular fetches and search as this will lighten your database a lot (no more complex queries DB, only fetch by node id from Solr filtered results). You should also make an extensive use of cache (view cache, cache blocks, static cache) and consider using a reverse proxy cache such as Varnish. With that your system would be more scalable :)
Thank you very much for your answer. Indeed, I must do a lot of work. The use of cache is minimal, because i still not understand deeply this, and sometimes with dynamic reports, the cache must be disabled. About ezsearch or ezfind, ezsearch is working fine, because i defined searchable too few attributes, only the strictly needed, and still need to disable many others. The vaccum is executed every 3 hours and analyze every 6 hours in Postgresql. As i said: i am really wondering about experiences (or successful cases) with big ezpublish implementations... maybe I must call it "ezperiences" (Experiences in eZpublish ;-)
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Hugo Sandoval
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Monday 29 November 2010 9:32:38 am
45M is not bad, by any standard. And you claim it works without excessive caching? Congrats! About improving performance for the all-encompassing ezcontentobject_attribute table, I think using a partitioned setup would be a great way to scale. We just need to figure out what is the best set of keys to partition...
:-( I didn't pay attention to partition configuration. The partition is standard ext3, I did think that maybe an JFS or XFS would be better, but i must implemented the app ASAP some weeks ago. In the following links you can see 2 snapshots of the tables FYI, if you see any weird please advice ... http://servicios.solventar.com.ve/images/phppgadmin1.png http://servicios.solventar.com.ve/images/phppgadmin2.png As you can see, the ezsearch_object_word_link isn't big. Partition table:
centauroXX:/var/www # df
S.ficheros Bloques de 1K Usado Dispon Uso% Montado en
/dev/cciss/c0d0p2 15480832 3897120 10797332 27% /
udev 4024084 148 4023936 1% /dev
/dev/cciss/c0d1p2 17220220 3399540 12945944 21% /usr
/dev/cciss/c0d0p5 2063504 127924 1830760 7% /tmp
/dev/cciss/c0d0p6 46781732 15956952 28448368 36% /var/lib/bbdd
/dev/cciss/c0d1p1 123854812 24510660 93052700 21% /var/lib/pgsql
/dev/sda1 488148160 74179552 413968608 16% /media The partition is:
/dev/cciss/c0d1p1 123854812 24510660 93052700 21% /var/lib/pgsql and fdisk -l:
Disco /dev/cciss/c0d1: 146.7 GB, 146778685440 bytes
255 heads, 63 sectors/track, 17844 cylinders
Units = cilindros of 16065 * 512 = 8225280 bytes
Disk identifier: 0x000d5c0b
Disposit. Inicio Comienzo Fin Bloques Id Sistema
/dev/cciss/c0d1p1 2 15666 125829112+ 83 Linux
/dev/cciss/c0d1p2 15667 17844 17494785 83 LinuxTop with online users working :
top - 12:57:55 up 6 days, 50 min, 1 user, load average: 6.39, 6.47, 6.52
Tasks: 137 total, 3 running, 133 sleeping, 0 stopped, 1 zombie
Cpu0 : 15.6%us, 3.7%sy, 0.0%ni, 51.8%id, 28.9%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 : 23.1%us, 1.9%sy, 0.0%ni, 1.9%id, 73.1%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu2 : 13.6%us, 3.3%sy, 0.0%ni, 23.9%id, 59.1%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu3 : 29.1%us, 5.0%sy, 0.0%ni, 2.6%id, 62.9%wa, 0.0%hi, 0.3%si, 0.0%st
Mem: 8048172k total, 7970412k used, 77760k free, 75972k buffers
Swap: 6289436k total, 912k used, 6288524k free, 7351988k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1324 postgres 20 0 2161m 1.9g 1.9g D 22 25.3 11:18.78 postmaster
23746 postgres 20 0 2161m 2.0g 2.0g D 18 25.6 19:41.02 postmaster
17119 postgres 20 0 2161m 1.8g 1.7g R 16 22.8 3:30.40 postmaster
19443 wwwrun 20 0 292m 30m 4424 S 15 0.4 0:06.90 httpd2-prefork
19599 postgres 20 0 2169m 1.7g 1.7g D 13 22.2 0:29.56 postmaster
19699 wwwrun 20 0 284m 23m 4440 S 2 0.3 0:02.68 httpd2-prefork
19774 wwwrun 20 0 277m 16m 4288 S 2 0.2 0:01.04 httpd2-prefork
19902 wwwrun 20 0 277m 15m 3780 S 2 0.2 0:00.40 httpd2-prefork
17103 root 20 0 234m 27m 5644 S 1 0.4 0:01.40 php
1562 root 39 19 0 0 0 S 0 0.0 10:37.76 kipmi0
1758 root 15 -5 0 0 0 D 0 0.0 7:59.93 kjournald
1 root 20 0 1064 412 348 S 0 0.0 0:03.80 initI am posting this for information about the implementation.
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Gaetano Giunta
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Monday 29 November 2010 10:08:24 am
I was thinking about 'database table partitioning' rather than 'partition table'. ezsearch_object_word_link is iirc only used by the plain serach engine, and not when ezfind is installed. If this was confirmed, and since you said that ezfind is in use, you might just delete all rows in that table. As for "standard" server tuning, I am sure you can find plenty of tips both in this forum and elsewhere. Random ideas: - connect to db via a pipe insted of using tcp if it's on the same machine - mount disk partitions -noatime - disable all unused service (avahi, cups and the like) - disable all unused apache modules and php extensions
Principal Consultant International Business
Member of the Community Project Board
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Hugo Sandoval
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Tuesday 30 November 2010 3:55:11 am
I was thinking about 'database table partitioning' rather than 'partition table'. ezsearch_object_word_link is iirc only used by the plain serach engine, and not when ezfind is installed. If this was confirmed, and since you said that ezfind is in use, you might just delete all rows in that table. As for "standard" server tuning, I am sure you can find plenty of tips both in this forum and elsewhere. Random ideas: - connect to db via a pipe insted of using tcp if it's on the same machine - mount disk partitions -noatime - disable all unused service (avahi, cups and the like) - disable all unused apache modules and php extensions
Sorry, about database table partition, i'd not change anything, except memory, max_fsm_pages in postgresql.conf and some others. Search is plain. What do you mean with "connect to db via a pipe"?
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