As part of the performance improvements for listing sessions for v0.9.0,
the view used to retrieve sessions for listing was updated to no longer
include a join on session_connection. However, a later migration that
was adding additional columns to this view inadvertently re-added the
join and session_connection columns. This resulted in requests to list
sessions performing this join, and returning additional rows for each
connection in a session. The application would ignore this additional
data, since it is no longer returned via the API. This would be
particularly impactful in cases where there are a large number of
connections per session, as this would greatly increase the amount of
data returned by the database.
This fix removes the session_connection join from this view, which
should restore the original performance improvements even in cases where
there is a large number of session connections per session.
See: https://github.com/hashicorp/boundary/pull/2160
Ref: 32070678dc
Fixes: 1e3c941be1
(cherry picked from commit 7aef341682e65b42c1b919e03936bdf81e26e87c)
The hcp billing `_all` views built a range of buckets using the
`generate_series` function using the minimum value of the
`session_pending_time` column from the `wh_session_accumulating_fact`
table as the start time and `now()` as the end time. It then truncated
values in the series using the `date_trunc` function. This allowed the
generated series of buckets returned to vary and could result in one
additional bucket being included in the series depending on the current
time and the start time.
As an illustrative example, the `hourly_all` query used:
select date_trunc('hour',time)
from generate_series(
(select min(session_pending_time) -- start time
from wh_session_accumulating_fact),
now(),
'1 hour'::interval
) as time;
Substituting the start time with a hard coded value to show the issue:
-- Show current time, where the minutes portion is 55
select now();
now
-------------------------------
2023-05-22 14:55:40.567605+00
(1 row)
-- generate series with start time's minutes portion at 57
select date_trunc('hour',time)
from generate_series(
'2023-05-22 01:57:00'::timestamptz,
now(),
'1 hour'::interval
) as time;
date_trunc
------------------------
2023-05-22 01:00:00+00
2023-05-22 02:00:00+00
2023-05-22 03:00:00+00
2023-05-22 04:00:00+00
2023-05-22 05:00:00+00
2023-05-22 06:00:00+00
2023-05-22 07:00:00+00
2023-05-22 08:00:00+00
2023-05-22 09:00:00+00
2023-05-22 10:00:00+00
2023-05-22 11:00:00+00
2023-05-22 12:00:00+00
2023-05-22 13:00:00+00
(13 rows)
-- Wait a few minutes
select now();
now
------------------------------
2023-05-22 14:58:48.75287+00
(1 row)
-- Now run again and get an extra result, even though still
-- within the same hour
select date_trunc('hour',time)
from generate_series(
'2023-05-22 01:57:00'::timestamptz,
now(),
'1 hour'::interval
) as time;
date_trunc
------------------------
2023-05-22 01:00:00+00
2023-05-22 02:00:00+00
2023-05-22 03:00:00+00
2023-05-22 04:00:00+00
2023-05-22 05:00:00+00
2023-05-22 06:00:00+00
2023-05-22 07:00:00+00
2023-05-22 08:00:00+00
2023-05-22 09:00:00+00
2023-05-22 10:00:00+00
2023-05-22 11:00:00+00
2023-05-22 12:00:00+00
2023-05-22 13:00:00+00
2023-05-22 14:00:00+00
(14 rows)
To fix this, we call the `generate_series` function truncating the start
time argument to the bucket size:
-- Hourly
select bucket
from generate_series(
date_trunc('hour', select min(session_pending_time)
from wh_session_accumulating_fact)),
now(),
'1 hour'::interval
) as bucket;
-- Monthly
select bucket
from generate_series(
date_trunc('month', select min(session_pending_time)
from wh_session_accumulating_fact)),
now(),
'1 month'::interval
) as bucket;
Fixes: 41b1b5b4b7
Adds the schema for ssh targets. This also changes the target listing
func to not error out when it encounters a target with an unknown type.
Instead, it now ignores it and continues to the next one.
Timothy Messier
Michael Gaffney
Todd
Louis Ruch
Hugo