On Wed, Jun 20, 2012 at 5:02 AM, Simon Riggs <si...@2ndquadrant.com> wrote: > On 13 June 2012 02:39, Magnus Hagander <mag...@hagander.net> wrote: > >>> I'm running the following, which gets piped over ssh to a remote >>> server (at gigabit ethernet speed): >>> pg_basebackup -v -D - -x -Ft -U postgres >>> >>> One thing that I've discovered is that if I throttle back the speed of >>> what is getting piped to the remote server, that directly correlates >>> to the load on the server. >> >> That seems to indicate that you're overloading the I/O system... Or >> the CPU, but more likely I/O. > > CPU utilisation of ssl connections is bad. If network bandwidth is > good, perhaps running WALSender at full speed with encryption can tank > the server.
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