Dear list I am experiencing a rather severe degradation of insert performance starting from an empty database: 120.000 mio SNPs imported in 28.9 sec - 4.16 mio/sec 120.000 mio SNPs imported in 40.9 sec - 2.93 mio/sec 120.000 mio SNPs imported in 49.7 sec - 2.41 mio/sec 120.000 mio SNPs imported in 58.8 sec - 2.04 mio/sec 120.000 mio SNPs imported in 68.9 sec - 1.74 mio/sec 120.000 mio SNPs imported in 77.0 sec - 1.56 mio/sec 120.000 mio SNPs imported in 85.1 sec - 1.41 mio/sec 120.000 mio SNPs imported in 94.0 sec - 1.28 mio/sec 120.000 mio SNPs imported in 103.4 sec - 1.16 mio/sec 120.000 mio SNPs imported in 108.9 sec - 1.10 mio/sec 120.000 mio SNPs imported in 117.2 sec - 1.02 mio/sec 120.000 mio SNPs imported in 122.1 sec - 0.98 mio/sec 120.000 mio SNPs imported in 132.6 sec - 0.90 mio/sec 120.000 mio SNPs imported in 142.0 sec - 0.85 mio/sec 120.000 mio SNPs imported in 147.3 sec - 0.81 mio/sec 120.000 mio SNPs imported in 154.4 sec - 0.78 mio/sec 120.000 mio SNPs imported in 163.9 sec - 0.73 mio/sec 120.000 mio SNPs imported in 170.1 sec - 0.71 mio/sec 120.000 mio SNPs imported in 179.1 sec - 0.67 mio/sec 120.000 mio SNPs imported in 186.1 sec - 0.64 mio/sec each line represents the insertion of 20000 records in two tables which is not really a whole lot. Also, these 20000 get inserted in one program run. The following lines are then again each the execution of that program. The insert are a text string in one table and a bit varying of length packed 24000 bits, also no big deal. As can be seen the degradation is severe going from 29 sec up to 186 sec for the same amount of data inserted. I have dropped the indices and primary keys, but that did not change the picture. Made commits every 100 records: also no effect. I have also played around with postgresql.conf but also this had no real effect (which is actually not surprising considering the small size of the database). At this stage the who database has a size of around 1GB. I am using pg 9.4 any idea of what might be going on? cheers Eildert -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
