pg

I have looked at the postgres documentation and the synopsis below is given: pg_resetxlog [-f] [-n] [-ooid ] [-x xid ] [-e xid_epoch ] [-m mxid ] [-O mxoff ] [-l timelineid,fileid,seg ] datadir But at no point in the documentation do they explain what the datadir is. Is it the %postgres-path%/9.0/data or could it be %postgres-path%/9.0/data/pgxlog ? Also, if I want to change my xlog directory, can I simply move the items in my current pg_xlog directory and run the command to point to another directory? (Assume my current pg_xlog directory is in /data1/postgres/data/pg_xlog AND the directory I

My stack is node, express and the pg module. I really try to understand by the documentation and some outdated tutorials. I dont know when and how to disconnect and to end a client. For some routes I decided to use a pool. This is my code const pool = new pg.Pool({ user: 'pooluser',host: 'localhost',database: 'mydb',password: 'pooluser',port: 5432}); pool.on('error', (err, client) => { console.log('error ', err); process.exit(-1); }); app.get('/', (req, res)=>{ pool.connect() .then(client => { return client.query('select ....') .then(resolved => { client.release(); console.log(resolved.rows);

I tried to install pg gem and I have had this warning: You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application. So I tried install libpq-dev package and I have had this warning: libpq-dev : Depends: libpq5 (= 8.4.17-0squeeze1) but 9.1.9-1~bpo60+1 is to be installed How to fix this? This should let you install the package you need :) Just tried it myself, I am not sure you will need all the packages on the second line, try it and see :) apt-get update apt-get install libxslt-dev libxml2-dev libpam-dev libedit-dev

I was using active record to get my stories and then generate a CSV, the standard way as done in the rails cast. But I have a lot of rows and it takes minutes. I think if I could get posgresql to do the csv rendering, then I could save some time. Heres what I have right now: query = "COPY stories TO STDOUT WITH CSV HEADER;" results = ActiveRecord::Base.connection.execute(query); But the results are empty for this query: => #<PG::Result:0x00000006ea0488 @connection=#<PG::Connection:0x00000006c62fb8 @socket_io=nil, @notice_receiver=nil, @notice_processor=nil>> 2.0.0-p247 :053 > result.count => 0

One of our application is built on Rails 3 which uses postgres as database. We observe that while doing load test i.e continuously submitting request, there are random exceptions related to database (comes from postgres_adapter): 1. PG::Error: Wait on socket error (WaitForMultipleObjects): 2. NoMethodError: undefined method `result_error_field' for nil:NilClass: I am not able to find any reference on cause of these issues as they're coming at different points. Any help on how to avoid this or solve this would be helpful. Thanks 来源： https://stackoverflow.com/questions/58318742/how-to-fix

I'm using XAMPP as my installation folder for PostgreSQL 9.3. C:\xampp\pgsql\9.3 And now I'm trying to install PostgreSQL gem using that directory as a reference: gem install pg -- --with-pg-include="C:\xampp\pgsql\9.3\include" --with-pg-lib="C:\xampp\pgsql\9.3\lib" --with-pg-config="C:\xampp\pgsql\9.3\bin\pg_config" But this command failed with errors listed below: ERROR: Error installing pg: ERROR: Failed to build gem native extension. C:/Ruby/Ruby200/bin/ruby.exe extconf.rb --with-pg-include=C:\xampp\pgsql\9.3 \include --with-pg-lib=C:\xampp\pgsql\9.3\lib --with-pg-config=C:\xampp\pgsql\9.