Hi all, Do you despair when you see the following periodically in "top" when a starman worker is recreated ? PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 9529 my-koha 20 0 460108 197212 17172 R 100.0 0.4 0:03.41 /usr/share/koha/api/v1/app.pl Or the following in top when you install koha-common package or restart the koha-common service? 11101 1-koha 20 0 447232 193320 16076 R 10.6 0.4 0:09.09 /usr/share/koha/api/v1/app.pl 11168 1-koha 20 0 447240 193264 16056 R 10.6 0.4 0:08.72 /usr/share/koha/api/v1/app.pl 11306 2-koha 20 0 447220 193148 16000 R 10.6 0.4 0:08.07 /usr/share/koha/api/v1/app.pl 11543 2-koha 20 0 447232 193036 15828 R 10.6 0.4 0:07.07 /usr/share/koha/api/v1/app.pl 11784 3-koha 20 0 441536 189664 16172 R 10.6 0.4 0:06.04 /usr/share/koha/api/v1/app.pl 11830 3-koha 20 0 439548 187212 15748 R 10.6 0.4 0:05.82 /usr/share/koha/api/v1/app.pl 11831 4-koha 20 0 438620 186344 15748 R 10.6 0.4 0:05.81 /usr/share/koha/api/v1/app.pl 11853 4-koha 20 0 437680 185672 16000 R 10.6 0.4 0:05.79 /usr/share/koha/api/v1/app.pl Well, I still have a lot of investigation left to do, but I notice 1 place that a lot of time taken is here (per worker): my $validator = JSON::Validator::OpenAPI::Mojolicious->new; $validator->load_and_validate_schema( $self->home->rel_file("api/v1/swagger/swagger.json"), { allow_invalid_ref => 1, } ); push @{$self->routes->namespaces}, 'Koha::Plugin'; my $spec = $validator->schema->data; $self->plugin( 'Koha::REST::Plugin::PluginRoutes' => { spec => $spec, validator => $validator } ); $self->plugin( OpenAPI => { spec => $spec, route => $self->routes->under('/api/v1')->to('Auth#under'), allow_invalid_ref => 1, # required by our spec because $ref directly under # Paths-, Parameters-, Definitions- & Info-object # is not allowed by the OpenAPI specification. } ); Anyone have ideas for improving this? Do we have to validate the schema every time? Can we move the schema validation into a different module and preload it into Starman using the -M flag so that it's done 1 time per Starman master instance rather than 1 time per Starman worker instance? I find "/usr/share/koha/api/v1/app.pl" to be the bane of deployments, as it puts a massive load on a server, when you have multiple Koha instances on the server. David Cook Software Engineer Prosentient Systems Suite 7.03 6a Glen St Milsons Point NSW 2061 Australia Office: 02 9212 0899 Online: 02 8005 0595