Hi folks, like Sven & Philip i have to report similar strange happenings on our server Profile: RH Linux 7.0 on a Compaq Alpha 1Gig Ram Zope 2.3.0 Postgres 7.0.3 w_pcgi configuration with Zope.cgi and Apache psycopg Postgres DA we tried also PoPy as DA connector but still the same result ... it seems to me, if all those cases are related, that RH7.0 and Postgres are used on all machines where this phenomen occurs. we have on this server an average hitcount of 3000 hits per hour so i suppose you can imagine that it is not really funny to restart a production server every hour. zope runs under 6 python threads ... 7119 nobody 1 0 27848 27M 3440 S 0.2 1.3 0:12 python 7124 nobody 0 0 27848 27M 3440 S 0.0 1.3 0:00 python 7125 nobody 10 0 27848 27M 3440 S 5.2 1.3 0:34 python 7126 nobody 0 0 27848 27M 3440 S 0.0 1.3 0:27 python 7127 nobody 0 0 27848 27M 3440 S 0.0 1.3 0:34 python 7128 nobody 0 0 27848 27M 3440 S 0.0 1.3 0:25 python 7143 postgres 5 0 6200 6200 4240 S 2.9 0.3 3:01 postmaster 8455 postgres 0 0 5840 5840 4136 S 0.0 0.2 0:20 postmaster 7118 root 0 0 5056 5056 2216 S 0.0 0.2 0:00 python 2511 apache 1 0 4344 4344 3896 S 0.0 0.2 0:00 httpd 2998 apache 3 0 4344 4344 3896 S 0.0 0.2 0:00 httpd 4755 apache 0 0 4344 4344 3896 S 0.0 0.2 0:00 httpd 6600 apache 0 0 4344 4344 3896 S 0.0 0.2 0:00 httpd 3573 apache 2 0 4336 4336 3896 S 0.0 0.2 0:00 httpd 4327 apache 1 0 4336 4336 3896 S 0.0 0.2 0:00 httpd 8726 apache 0 0 4336 4336 3896 S 0.0 0.2 0:00 httpd 6231 apache 0 0 4320 4320 3880 S 0.0 0.2 0:00 httpd 7414 apache 2 0 4320 4320 3880 S 0.0 0.2 0:00 httpd 7780 apache 4 0 4320 4320 3880 S 0.0 .................. the memory usage of the python threads grows slowly but constantly until zope dies .... has anyone a hint? What would be the best method to locate the memory leak? Thank you Francisco Webber