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postgresql / db-koji01: allow adjusting max_workers and friends

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db-koji01 has been running with this since before the mass rebuild, and
it seems to make it have a higher load, but process faster and without
stalling when doing backups or when long/bad koji-gc queries for old
versions of texlive hit it.

Signed-off-by: Kevin Fenzi <kevin@scrye.com>
This commit is contained in:
Kevin Fenzi 2020-08-05 16:28:08 -07:00
parent 77a3276003
commit 72424c52fb
2 changed files with 17 additions and 1 deletions
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6
inventory/host_vars/db-koji01.iad2.fedoraproject.org
View file

@ -43,8 +43,12 @@ custom_rules: [
nrpe_procs_warn: 600
nrpe_procs_crit: 700
# we backup the backup on db-koji01 until we can replace now
db_backup_dir: ['/backups']
shared_buffers: "32GB"
effective_cache_size: "100GB"
max_stack_depth: "6MB"
max_worker_processes: 64
max_parallel_workers_per_gather: 32
max_parallel_maintenance_workers: 8
max_parallel_workers: 64

12
roles/postgresql_server/templates/postgresql.conf-12
View file

@ -207,6 +207,18 @@ dynamic_shared_memory_type = posix # the default is the first option
#parallel_leader_participation = on
#max_parallel_workers = 8 # maximum number of max_worker_processes that
# can be used in parallel operations
{% if max_worker_processes is defined %}
max_worker_processes = {{ max_worker_processes }}
{% endif %}
{% if max_parallel_workers_per_gather is defined %}
max_parallel_workers_per_gather = {{ max_parallel_workers_per_gather }}
{% endif %}
{% if max_parallel_maintenance_workers is defined %}
max_parallel_maintenance_workers = {{ max_parallel_maintenance_workers }}
{% endif %}
{% if max_parallel_workers is defined %}
max_parallel_workers = {{ max_parallel_workers }}
{% endif %}
#old_snapshot_threshold = -1 # 1min-60d; -1 disables; 0 is immediate
# (change requires restart)
#backend_flush_after = 0 # measured in pages, 0 disables