Startup is not a great idea if your webserver is up forever - I have some which are running for months.
How frequently do you wish to refresh the cache ? if you do in startup then your cache refresh is tied to the service restart which might not be ideal or feasible. On Mon, Sep 14, 2020 at 12:26 AM Adam Prime <adam.pr...@utoronto.ca> wrote: > I left out the link to the thread. Here it is. > > https://marc.info/?t=119062870700002&r=1&w=2 > > > > On Sep 14, 2020, at 1:18 AM, Wesley Peng <wp...@pobox.com> wrote: > > That's great. Thank you Adam. > > Adam Prime wrote: > > If the database doesn't change very often, and you don't mind only getting > updates to your database when you restart apache, and you're using prefork > mod_perl, then you could use a startup.pl to load your database before > apache forks, and get a shared copy globally in all your apache children. > > https://perl.apache.org/docs/1.0/guide/config.html#The_Startup_File > > This thread from 13 years ago seems to have a clear-ish example of how to > use startup.pl to do what i'm talking about. > > If you need it to update more frequently than when you restart apache, you > could potentially use a PerlChildInitHandler to load the data when apache > creates children. This will use more memory, as each child will have it's > own copy, and can also result in situation where children can have > different versions of the database loaded and be serving requests at the > same time. If you want to go this way you might want to also add a > MaxRequestsPerChild directive to your apache config to make sure that > you're children die and get refreshed on the regular, if you don't already > have one. > > Adam > > On 9/13/2020 10:51 PM, Wesley Peng wrote: > > Hello > > > I am not so familiar with modperl. > > > For work requirement, I need to access IANA TLD database. > > > So I wrote this perl module: > > https://metacpan.org/pod/Net::IANA::TLD > > > But, for each new() in the module, the database file will be downloaded > from IANA's website. > > > I know this is pretty Inefficient. > > > My question is, can I cache the new'ed object by modperl? > > > If so, how to do? > > > Thanks. > >
