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Bug 1650259

Summary: slow errata query on dashboard
Product: Red Hat Satellite Reporter: sthirugn <sthirugn>
Component: Errata ManagementAssignee: Partha Aji <paji>
Status: CLOSED ERRATA QA Contact: Perry Gagne <pgagne>
Severity: high Docs Contact:
Priority: unspecified    
Version: 6.3.2CC: andrew.schofield, egolov, kabbott, mhulan
Target Milestone: 6.5.0Keywords: FieldEngineering, PrioBumpField, Triaged
Target Release: Unused   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: tfm-rubygem-katello-3.10.0.13-1 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of:
: 1684702 (view as bug list) Environment:
Last Closed: 2019-05-14 12:38:50 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description sthirugn@redhat.com 2018-11-15 17:00:50 UTC 
Description of problem:
slow errata query on dashboard

Version-Release number of selected component (if applicable):
Satellite 6.3.2.1

How reproducible:
Always

Steps to Reproduce:
The errata query running while loading the `Latest Errata` widget is slow and it takes a minute or so to complete in an environment with tens of thousands of content hosts.

Actual results:
From a customer postgres log:
2018-11-13 15:48:49 CET LOG:  duration: 57899.066 ms  execute <unnamed>: SELECT  "katello_errata".* FROM "katello_errata" WHERE "katello_errata"."id" IN (SELECT "katello_errata"."id" FROM "katello_errata" INNER JOIN "katello_content_facet_errata" ON "katello_content_facet_errata"."erratum_id" = "katello_errata"."id" INNER JOIN "katello_content_facets" ON "katello_content_facets"."id" = "katello_content_facet_errata"."content_facet_id" WHERE "katello_content_facets"."host_id" IN (62722, 62491, 62714, 55649, 76365, 71628, 47225, 60610, 65394, 65702, 76176, 76414, 62661, 76168, 69493, 5852, 75420, 56275, 69760, 5851, 5951, 62715, 71077, 1900, 1898, 69768, 68857, 62809, 68860, 65819, 7941, 46094, 68799, 296, 3918, 7920, 68859, 53753, 17840, 69645, 71079, 20953, 49090, 64997, 53764, 21250, 69437, 71047, 46977, 3, 65822, 65821, 47224, 65820, 298, 65703, 69657, 68858, 10046, 5636, 76170, 16608, 45148, 5631, 22449, 65823, 2866, 2274, 5630, 5628, 3427, 5560, 18091, 47064, 5612, 6988, 6760, 69769, 69354, 48893, 39879, 46986, 7115, 5627, 34668, 15825, 17334, 20733, 52097, 54362, 65563, 65399, 45808, 49326, 299, 49325, 62483, 1902, 71078, 50379, 34996, 71076, 40335, 69762, 73328, 76220, 69432, 1905, 46083, 73801, 64679, 47065, 69761, 62670, 44980, 45149, 72054, 66401, 19193, 1904, 60612, 44373, 62669, 62664, 69346, 482, 46082, 72483, 45529, 62671, 63140, 48894, 38722, 53496, 45706, 72639, 45653, 62668, 66661, 41251, 41482, 65558, 34321, 34322, 163, 57429, 67659, 39796, 72405, 72329, 34995, 4966, 44471, 42644, 66615, 72365, 52555, 58735, 62437, 57940, 69774, 45866, 41483, 71254, 280, 71482, 72494, 69348, 43954, 25170, 72607, 73764, 1895, 56330, 67382, 57156, 46095, 57155, 71606, 18650, 45840, 63979, 45865, 71452, 66390, 64047, 25174, 57197, 57428, 69347, 66766, 20434, 75419, 56619, 62654, 72627, 69072, 60122, 60633, 62485, 34665, 62488, 45810, 62720, 64682, 74941, 66758, 58631, 69773, 56190, 43256, 25173, 45523, 45248, 57112, 39836, 62487, 62718, 45235, 1864, 45237, 57304, 62666, 45239, 57941, 57430, 48763, 62482, 25172, 22793, 57244, 57221, 46331, 45124, 45123, 53255, 25171, 53523, 22699, 45236, 52553, 62644, 49182, 48594, 56617, 56288, 32317, 56132, 43955, 1901, 62568, 53500, 45841, 50157, 56329, 56332, 966, 20433, 21225, 4002))  ORDER BY katello_errata.updated desc LIMIT 6

Expected results:
the query should be optimized to run faster.

Additional info:
A related bug https://bugzilla.redhat.com/show_bug.cgi?id=1553879 was fixed in 6.3.1 which removed the distinct clause from the query, but there is more scope for optimization.
Comment 1 sthirugn@redhat.com 2018-11-15 17:07:01 UTC 
This query takes anywhere between 30 seconds to 90 seconds in this customer environment.
Comment 4 Marek Hulan 2018-12-19 15:26:09 UTC 
Might be related to https://bugzilla.redhat.com/show_bug.cgi?id=1656470#c3
Comment 5 Partha Aji 2019-01-17 20:35:19 UTC 
Connecting redmine issue https://projects.theforeman.org/issues/25884 from this bug
Comment 6 Bryan Kearney 2019-01-17 23:04:41 UTC 
Moving this bug to POST for triage into Satellite 6 since the upstream issue https://projects.theforeman.org/issues/25884 has been resolved.
Comment 8 Perry Gagne 2019-02-04 16:42:37 UTC 
Verified fix in 6.5 snap 13. 

Used content-host-d to generate a number of hosts and the query time when down a lot:

From postgres logs, times for " execute <unnamed>: SELECT  "katello_errata".* FROM "katello_errata" "

8K Hosts: 2019-01-31 11:26:10 EST LOG:  duration: 1373.899 ms
12K hosts : 2019-02-04 10:11:04 EST LOG:  duration: 2088.931 ms  execute <unnamed>: SELECT  "katello_errata".* FROM "katello_errata"

The dashboard widget loaded almost instantly as a result.
Comment 9 Mike McCune 2019-03-01 22:16:34 UTC 
This bug was cloned and is still going to be included in the 6.4.3 release. It no longer has the sat-6.4.z+ flag and 6.4.3 Target Milestone Set which are now on the 6.4.z cloned bug. Please see the Clones field to track the progress of this bug in the 6.4.3 release.
Comment 12 errata-xmlrpc 2019-05-14 12:38:50 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:1222