Hi Nick I upgraded to version 1.2 (linux RedHat 6.2, PHP 4.0.6) and changed the php.ini (with default values). I can see that phpa is loaded in the phpinfo page, but there are errors in the Apache error_log: [Tue Nov 20 20:40:19 2001] [notice] PHPA starting [Tue Nov 20 20:40:19 2001] [notice] Apache/1.3.12 (Unix) (Red Hat/Linux) PHP/4.0.6 configured -- resuming normal operations [Tue Nov 20 20:40:32 2001] [warn] shm - Unable to get shm sems - Invalid argument [Tue Nov 20 20:40:32 2001] [warn] shm cache disabled Of course, no cached files are created. Here is an extract of my php.ini zend_extension="/usr/local/Zend/lib/php_accelerator.so" ; Sets the shared memory cache size in megabytes. ; Integer values only. Defaults to 8MB. phpa.shm_size = 8 ; Sets the shared memory key. Maybe specific in hex notation as below or as ; an integer. ; Defaults to 0xc0deb00 phpa.shm_key = 0xc0deb00 ; Set the file cache directory. Must be an absolute path. ; Defaults to /tmp. phpa.cache_dir = /tmp ; Enable some shared memory cache logging ; Defaults to 'off' phpa.shm_logging = on ; Set the interval between checks of the shared memory cache for ; rebalancing. ; A purely numeric interval is in seconds, otherwise append one of 's', 'm', ; 'h', 'd' to specify a period in seconds, minutes, hours or days. ; e.g 10m is ten minutes, 3h is three hours. ; Defaults to 5 minutes phpa.shm_stats_check_period = 5m ; Enable or disable the Accelerator entirely. Defaults to 'on'. phpa = off ; Set the time-to-live period for shared memory cache entries. ; Specify a period as a number followed by 's', 'm', 'h', 'd' to denote ; seconds, minutes, hours, or days. E.g. 12h, 7d etc. ; Any shared memory cache entries that haven't been accessed within this period ; will be flushed from the cache the next time cache stats are checked, (as ; determined by the setting of phpa.shm_stats_check_period). ; The period defaults to 12 hours and is probably suitable for most cases. ; Sites where the cache is undersized or where files become stale ; frequently (e.g. because files are replaced with new versions [as opposed ; to being overwritten] might want to reduce this. ; Sites where files might not be accessed for longer than 12 hours ; should increase the value. phpa.shm_ttl = 12h ; Set the maximum number of Apache instances that may use the shared memory ; cache. The default value is 512. Any processes created after the limit ; is reached will still benefit from acceleration gained from reading the ; disc cache. phpa.shm_max_processes = 512 Any idea on what is going on here ? Ronan PAUL _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp ------------------------------------------------------------------------ www.php-accelerator.co.uk Home of the free PHP Accelerator To post, send email to phpa@xxxxxxxxxxxxx To unsubscribe, email phpa-request@xxxxxxxxxxxxx with subject unsubscribe