[arvados] updated: 2.7.0-5095-g3f3686330b

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Summary of changes:
 doc/admin/upgrading.html.textile.liquid            |  8 +++
 lib/config/config.default.yml                      | 12 +++-
 lib/config/export.go                               |  1 +
 lib/service/cmd.go                                 | 23 +++++--
 lib/service/cmd_test.go                            | 71 ++++++++++++++--------
 sdk/go/arvados/config.go                           |  1 +
 .../multi_host/aws/pillars/arvados.sls             |  3 +-
 .../multi_host/aws/pillars/nginx_passenger.sls     |  2 +-
 8 files changed, 86 insertions(+), 35 deletions(-)

       via  3f3686330be2141f0cacc511eabac15cc8449e7c (commit)
       via  763bf38c5dd4763619bd72394f604a173fcdc510 (commit)
       via  a12de3eeb2f75458120357ed520bb511242104bd (commit)
       via  2966d83fa4e18eb62d1bbb1c9a0c39d9d845112f (commit)
      from  f153e5c6803719fa847705c456a536072395e68c (commit)

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commit 3f3686330be2141f0cacc511eabac15cc8449e7c
Merge: f153e5c680 763bf38c5d
Author: Tom Clegg <tom at curii.com>
Date:   Fri Oct 27 11:44:38 2023 -0400

    Merge branch '21124-max-rails-reqs'
    
    fixes #21124
    
    Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom at curii.com>


commit 763bf38c5dd4763619bd72394f604a173fcdc510
Author: Tom Clegg <tom at curii.com>
Date:   Fri Oct 27 11:44:10 2023 -0400

    21124: Note MaxConcurrentRequests affects all services.
    
    Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom at curii.com>

diff --git a/lib/config/config.default.yml b/lib/config/config.default.yml
index c5a164e790..abffc1c0b8 100644
--- a/lib/config/config.default.yml
+++ b/lib/config/config.default.yml
@@ -225,6 +225,12 @@ Clusters:
 
       # Maximum number of concurrent requests to process concurrently
       # in a single service process, or 0 for no limit.
+      #
+      # Note this applies to all Arvados services (controller, webdav,
+      # websockets, etc.). Concurrency in the controller service is
+      # also effectively limited by MaxConcurrentRailsRequests (see
+      # below) because most controller requests proxy through to the
+      # RailsAPI service.
       MaxConcurrentRequests: 64
 
       # Maximum number of concurrent requests to process concurrently

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