Some "special:" pages return blank pages

[nikejam]

Deki: 9.02
OS: Ubuntu 9.04 - 64bit

1. http://<deki>/Special:Recentchanges
2. http://<deki>/index.php?title=Special:Contributions&target=id
3. http://<deki>/Special:ListRss
4. http://<deki>/User:
5. http://<deki>/index.php?title=Special%3ASearch&search=2바이트 검색어&fulltext=검색

When I try the above pages via menu items on the top and/or via control panel, all I get are blank pages.
Anybody any idea?

[Guerric]

If you are getting blank pages served then there are probably PHP errors. Check your PHP error log or turn up the error_reporting level in your php.ini

[nikejam]

error_reporting = E_ALL
log_errors = On
error_log = syslog
(for the last line, I originally used ....error = /var/log/apache2/php.errors......but was getting nothing, so I changed to syslog)

and I am getting nothing in the syslog file.
----
(several minutes later)

I added the following line at the top of the "LocaSettings.php":

error_reporting = E_ALL

and when I tried the problematic special pages (recent changes, search, etc), I got something like "memory ran out..."...so I went back to php.ini and changed the memory_limit from 16 to 128 (is it too much? the machine has 1 Gb RAM). And, Viola~ it works now.

[Guerric]

Common issue. Our PHP frontend likes to load the large API XML results into memory for awhile.

[nikejam]

First of all, THANKS! (forgot to thank you in prev. reply :-)

What is the recommended "memory_limit" in the "php.ini" file?
If 16Mb is too low for some setting, shouldn't the installer (http://<your deki>/config/index.php, I guess?) check for it?
I tried the FAQ and couldn't find a relavant page.

[Guerric]

PeteE recommends at least 64megs. Glad you figured out the problem.