Hello Evgeniy! I can move the database to another server... This is the cat of /proc/cpuinfo. Does it have enough power or should I go for a better one?? (It has 32 processors like this one): cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 45 model name : Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz stepping : 7 microcode : 0x70d cpu MHz : 1200.000 cache size : 20480 KB physical id : 0 siblings : 16 core id : 0 cpu cores : 8 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid bogomips : 5187.62 clflush size : 64 cache_alignment : 64 address sizes : 46 bits physical, 48 bits virtual power management: free total used free shared buffers cached Mem: 65901148 32702336 33198812 0 264936 20625024 -/+ buffers/cache: 11812376 54088772 Swap: 134217724 413088 133804636 Thank you for your help, Andrés El Mar 10, 2014, a las 3:45 PM, Evgeniy Shishkin escribió: > > On 07 Mar 2014, at 13:18, acanada <acanada@xxxxxxx> wrote: > >> The table entity2document2 has 30GB. In consecutive runs it gets much better... 30ms apron. > > So you just benchmarking your hard drives with random iops. > > You need more ram and faster disks. **NOTA DE CONFIDENCIALIDAD** Este correo electrónico, y en su caso los ficheros adjuntos, pueden contener información protegida para el uso exclusivo de su destinatario. Se prohíbe la distribución, reproducción o cualquier otro tipo de transmisión por parte de otra persona que no sea el destinatario. Si usted recibe por error este correo, se ruega comunicarlo al remitente y borrar el mensaje recibido. **CONFIDENTIALITY NOTICE** This email communication and any attachments may contain confidential and privileged information for the sole use of the designated recipient named above. Distribution, reproduction or any other use of this transmission by any party other than the intended recipient is prohibited. If you are not the intended recipient please contact the sender and delete all copies. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance