$customer uses Zend_Cache in their codebase – and I noticed that every so often a page request would take ~5 seeconds (for no apparent reason), while normally they take < 1 second … Some rummaging and profiling with xdebug showed that some requests looked like : Note how there are 25,000 or so calls for … Continue reading
If you’ve updated your varnish server’s configuration, there doesn’t seem to be an equivalent of ‘apachectl configtest’ for it, but you can do : varnishd -C -f /etc/varnish/default.vcl If everything is correct, varnish will then dump out the generated configuration. Otherwise you’ll get an error message pointing you to a specific line number.
This is probably of little use to normal people, or even many PHP programmers – unless you have more than a handful of directories to rummage through when __autoload()’ing PHP class files. I’ve sometimes found myself rummaging through 10-15, and this has a performance impact. Some random code which uses APC to cache a lookup … Continue reading