[PERFORM] Big number of connections
Hello! We are going to build system based on PostgreSQL database for huge number of individual users (few thousands). Each user will have his own account, for authorization we will use Kerberos (MIT or Windows). Most of users will have low activity, but for various reasons, connection should be open all the time. I'd like to know what potential problems and limitations we can expect with such deployment. During preliminary testing we have found that for each connection we need ~1MB RAM. Is there any way to decrease this ? Is there any risk, that such number of users will degrade performance ? I'll be happy to hear any remarks and suggestions related to design, administration and handling of such installation. best regards Jarek -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
Re: [PERFORM] Big number of connections
Hello! Dnia 2016-03-31, czw o godzinie 19:12 +, Igor Neyman pisze: > Take a look at PgBouncer. > It should solve your problems. Well, we don't have problems yet :), but we are looking for possible threats. I'll be happy to hear form users of big PostgreSQL installations, how many users do you have and what kind of problems we may expect. Is there any risk, that huge number of roles will slowdown overall performance ? best regards Jarek -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
[PERFORM] More cores or higer frequency ?
Hello! I've heavy loaded PostgreSQL server, which I want to upgrade, so it will handle more traffic. Can I estimate what is better: more cores or higher frequency ? I expect that pg_stat should give some tips, but don't know where to start... best regards Jarek -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
Re: [PERFORM] More cores or higer frequency ?
Dnia 2017-05-23, wto o godzinie 11:39 -0700, Steve Crawford pisze: > The answer, as always, is "it depends." > > > Can you give us an overview of your setup? The appropriate setup for > small numbers of long-running analytical queries (typically faster > CPUs) will be different than a setup for handling numerous > simultaneous connections (typically more cores). I have pool of clients (~30) inserting to database about 50 records per second (in total from all clients) and small numer (<10) clients querying database for those records once per 10s. Other queries are rare and irregular. The biggest table has ~ 100mln records (older records are purged nightly). Database size is ~13GB. I near future I'm expecting ~150 clients and 250 inserts per second and more clients querying database. Server is handling also apache with simple web application written in python. For the same price, I can get 8C/3.2GHz or 14C/2.6GHz. Which one will be better ? > > But CPU is often not the limiting factor. With a better understanding > of your needs, people here can offer suggestions for memory, storage, > pooling, network, etc. > > > Cheers, > Steve > > > > On Tue, May 23, 2017 at 11:29 AM, Jarek wrote: > Hello! > > I've heavy loaded PostgreSQL server, which I want to upgrade, > so it will > handle more traffic. Can I estimate what is better: more cores > or > higher frequency ? I expect that pg_stat should give some > tips, but > don't know where to start... > > best regards > Jarek > > > > -- > Sent via pgsql-performance mailing list > (pgsql-performance@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-performance > > -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
