[Postgres-xc-general] High performance

[Bartłomiej W. <bar...@tu...>]

Hello,

When I add every new node to my cluster the performance of the entire 
cluster decreases by 20 percent.

Cluster scheme:

Host1(vm1, IP1, 2core 4GB ram): gtm
Host2(vm2, IP2, 2core 4GB ram): 1 gtm_proxy + 1 coordinator + 1 datanode
Host3(vm3, IP3, 2core 4GB ram): 1 gtm_proxy + 1 coordinator + 1 datanode
Host4(vm4, IP4, 2core 4GB ram): 1 gtm_proxy + 1 coordinator + 1 datanode

I run pgbench (-S) and getting:    ~1200 tps (on each)

when I use (host1 and host2 and host3) the result is: ~1500 tps (on each)

when I use (host 1 and host 2) the result is: ~1800 tps


Is this normal behavior ?

All hosts  use the same  disk storage(very large  throughput  ~Gbit/s), cores  are not common, ramare not common


Regards!