OPENTASK: Iterative and Incremental Publishing
Sunday, July 13th, 2008The publisher Opentask has got its own website:
Please don’t hesitate to visit and comment 
- Dmitry Vostokov @ DumpAnalysis.org -
Archive for July 13th, 2008
Lean Tracing
Sunday, July 13th, 2008Sometimes ETW (or CDF) traces can be really huge. Unless we trace the elusive but the specific error we already know about, there is no need to make such traces if we can reproduce the issue. My favourite example is connectivity problems when you cannot connect to a terminal server. The best way is to start tracing, try to connect, get an error and stop tracing. Usually it takes no more than a couple of minutes. We can even trace all modules here just to make sure that we don’t miss anything. It is also better to focus on one specific scenario per one lean trace instead of packing several of them into one big trace.
- Dmitry Vostokov @ DumpAnalysis.org -
Debugging PHP
Sunday, July 13th, 2008Yesterday I noticed that certain wp-admin PHP pages were not accessible anymore. I was able to view messages but not to post them or change options. Originally I thought that this was the side effect of having two versions of Wordpress running at the same time or improper DB charset configuration of the second instance (I recently set up the Russian version of my blog). I tried to reinstall the latter instance with proper configuration and language but this didn’t help. HTTP fiddler showed no response from the server for problem PHP pages. I also noticed that my other domains running on the same server didn’t have this problem. Finally I hit upon the clue: one of logs had this error:
[client xx.xx.xx.xxx] PHP Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 11 bytes) in […] dumpanalysis.org/httpdocs/ru/blog/wp-admin/includes/update.php on line 17
Out of memory error! Googling “PHP memory” hit upon the solution to add the following line to .htaccess file:
php_value memory_limit 20M
Now it all suddenly made sense to me. I didn’t think of possible artificial memory limits in script engines. Adding the second instance of Wordpress hit PHP memory limit which was already almost exhausted by my Wordpress blog with more than 500 posts, Drupal portal, phpBB forum and MediaWiki.
Now I’m able to write posts again Happy debugging!
- Dmitry Vostokov @ DumpAnalysis.org -