You should specify a lot more if you want any suggestions (OS, OS version, file system, CPU, RAM, Hard drive speed, Memory for PHP, memory for eaccelerator .... ).
So beside upgrading to eZ Publish 4.0, here are some in depth performance discussions:
http://ez.no/developer/forum/setup_design/improving_ez_publish_environment_and_performance http://ez.no/developer/forum/general/ez_publish_performance_optimisation_faq
here is my hardware configuration
OS: debian 4.0 etch
CPU : xeon dual core
RAM : 1Go
Memory for PHP : 256
memory for eaccelerator : 32 (I have read that this value should not exceed the value in proc/sys/kernel/shmmax)
Check two more things - in Setup > System Information see if the php accelerator is recognized as being installed by eZ Publish.
Also, in Setup > Ini Settings select sitei.ini and see if the settings shown match what you posted. This is just to make sure that there is not a settings override that is changing them.
be sure that the <ezroot>/var directory is writeable for the user running the webserver, perhaps the cache files can't be saved and thus your system always have to process the templates.
--
Xavier Serna
eZ Publish Certified Developer
Departament de Software
Microblau S.L. - http://www.microblau.net
+34 937 466 205
Do you experience the same problem in admin (also after installing ezjaxx extension)? If not, how many sql fetches does your front end produce? (see debug output).