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Bug #26030

Updated by John Mitsch 10 months ago

Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1656470

*Description of problem:*
I've tested performance of the report with the following results:

*a) 10000 hosts with these channels synced (but no applicable errata): rhel-7-server-extras-rpms, rhel-7-server-optional-rpms, rhel-7-server-rpms, rhel-7-server-satellite-capsule-6.4-rpms, rhel-7-server-satellite-tools-6.4-rpms - 80 s
*b) The same as a) but with filter to 0 hosts: 1 s
*c) The same as a) but added 63 hosts with 10 000 applicable errata: 140 s
*d) The same as c) but filtered to only 7 hosts: 16 s
*e) The same as c) but errata filtered to 0 (search in form 'nonexistentname'): 16 m
*f) The same as c) but errata filtered to 0 (search in form 'id="nonexistentname"'): 90 s
*g) The same as c) but errata filtered to 1: 110 s
*h) The same as a but with filters from a) and g): 11 s

Notice the 16 *minutes* long time in e) compared to 90 *seconds* in f) while those two cases only differ in filter form. This might be reasoned as expected behavior (form in e compares different data and it may be that much more resource consuming) but I think this is worth reporting and checking.

Tested on a RHEL7 machine with Intel Xeon, 4 sockets, 32 cores, hyperthreading, 2.7 Ghz, 128 GB RAM.

*Version-Release number of selected component (if applicable):*
Sat 6.5 snap 5

*How reproducible:*
Deterministic but depends on configuration

*Steps to Reproduce:*
1. Monitor -> Report Templates
2. In the Available Errata report's row, click Generate
3. Fill in the search in form 'id="nonexistentname"'
4. Submit
5. Do the same as in 1..4 but with search 'nonexistentname'

*Actual results:*
The second report generation takes much longer

*Expected results:*
Not sure. Perhaps a lesser difference.

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