branch master updated (5465441 -> 7f49756)

[Christopher Baines]

cbaines pushed a change to branch master
in repository data-service.

    from 5465441  Delete derivations in parallel
     new 404f39a  Drop default thread count for 
make-postgresql-connection-channel
     new 7f49756  Track some pg_stat metrics

The 2 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "add" were already present in the repository and have only
been added to this reference.


Summary of changes:
 guix-data-service/database.scm       |  2 +-
 guix-data-service/metrics.scm        | 46 +++++++++++++++++++++++++++++++++++-
 guix-data-service/web/controller.scm | 38 ++++++++++++++++++++++++++++-
 3 files changed, 83 insertions(+), 3 deletions(-)