added postgresql server profile

A new tuned profile for PostgreSQL database server.

This profile is based of information collected from various
presentations about Linux tuning at PGConf.

See: https://www.socallinuxexpo.org/sites/default/files/presentations/scale_kosmodemiansky_linux_internals.pdf

Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>

doc/manual/modules/performance/ref_tuned-profiles-distributed-with-rhel.adoc

@@ -45,6 +45,8 @@ A profile optimized for Oracle databases loads based on `throughput-performance`
 `desktop`::
 A profile optimized for desktops, based on the `balanced` profile. It additionally enables scheduler autogroups for better response of interactive applications. 
 
+`postgresql`::
+A profile optimized for PostgreSQL databases loads based on `throughput-performance` profile. It additionally disables transparent huge pages and modifies other performance-related kernel parameters. This profile is provided by the [package]`tuned-profiles-postgresql` package.
 
 [discrete]
 == Real-time profiles

man/tuned-adm.8

@@ -117,6 +117,7 @@ Unload tunings.
 .BR tuned\-profiles\-nfv\-host (7)
 .BR tuned\-profiles\-nfv\-guest (7)
 .BR tuned\-profiles\-compat (7)
+.BR tuned\-profiles\-postgresql (7)
 .SH AUTHOR
 .nf
 Jaroslav Škarvada <jskarvad@redhat.com>

man/tuned-profiles-atomic.7

@@ -59,6 +59,7 @@ netfilter connections tracking.
 .BR tuned\-profiles\-nfv\-guest (7)
 .BR tuned\-profiles\-cpu\-partitioning (7)
 .BR tuned\-profiles\-compat (7)
+.BR tuned\-profiles\-postgresql (7)
 .SH AUTHOR
 .nf
 Jaroslav Škarvada <jskarvad@redhat.com>

man/tuned-profiles-mssql.7

@@ -44,6 +44,7 @@ throughput-performance profile.
 .BR tuned\-profiles\-nfv\-guest (7)
 .BR tuned\-profiles\-cpu\-partitioning (7)
 .BR tuned\-profiles\-compat (7)
+.BR tuned\-profiles\-postgresql (7)
 .SH AUTHOR
 .nf
 Jaroslav Škarvada <jskarvad@redhat.com>

man/tuned-profiles-nfv-guest.7

@@ -50,6 +50,7 @@ Profile optimized for virtual guests based on realtime profile.
 .BR tuned\-profiles\-nfv\-host (7)
 .BR tuned\-profiles\-cpu\-partitioning (7)
 .BR tuned\-profiles\-compat (7)
+.BR tuned\-profiles\-postgresql (7)
 .SH AUTHOR
 .nf
 Jaroslav Škarvada <jskarvad@redhat.com>

man/tuned-profiles-nfv-host.7

@@ -50,6 +50,7 @@ Profile optimized for virtual hosts based on realtime profile.
 .BR tuned\-profiles\-nfv\-guest (7)
 .BR tuned\-profiles\-cpu\-partitioning (7)
 .BR tuned\-profiles\-compat (7)
+.BR tuned\-profiles\-postgresql (7)
 .SH AUTHOR
 .nf
 Jaroslav Škarvada <jskarvad@redhat.com>

man/tuned-profiles-oracle.7

@@ -52,6 +52,7 @@ performance related kernel parameters.
 .BR tuned\-profiles\-nfv\-guest (7)
 .BR tuned\-profiles\-cpu\-partitioning (7)
 .BR tuned\-profiles\-compat (7)
+.BR tuned\-profiles\-postgresql (7)
 .SH AUTHOR
 .nf
 Jaroslav Škarvada <jskarvad@redhat.com>

man/tuned-profiles-postgresql.7

@@ -0,0 +1,61 @@
+.\"/*
+.\" * All rights reserved
+.\" * Copyright (C) 2020 Red Hat, Inc.
+.\" * Copyright (C) 2020 Deutsches Elektronen-Synchrotron DESY
+.\" * Authors: Jaroslav Škarvada
+.\" *          Tigran Mkrtchyan
+.\" *
+.\" * This program is free software; you can redistribute it and/or
+.\" * modify it under the terms of the GNU General Public License
+.\" * as published by the Free Software Foundation; either version 2
+.\" * of the License, or (at your option) any later version.
+.\" *
+.\" * This program is distributed in the hope that it will be useful,
+.\" * but WITHOUT ANY WARRANTY; without even the implied warranty of
+.\" * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+.\" * GNU General Public License for more details.
+.\" *
+.\" * You should have received a copy of the GNU General Public License
+.\" * along with this program; if not, write to the Free Software
+.\" * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+.\" */
+.\"
+.TH TUNED_PROFILES_POSTGRESQL "7" "29 Jul 2020" "Fedora Power Management SIG" "tuned"
+.SH NAME
+tuned\-profiles\-postgresql - description of profiles provided for PostgreSQL Server
+
+.SH DESCRIPTION
+These profiles are provided for the PostgreSQL Database server.
+
+.SH PROFILES
+The following profiles are provided:
+
+.TP
+.BI "postgresql"
+Profile optimized for PostgreSQL databases based on throughput\-performance profile.
+It additionally disables transparent huge pages and modifies some other
+performance related kernel parameters.
+
+.SH "FILES"
+.nf
+.I /etc/tuned/*
+.I /usr/lib/tuned/*
+
+.SH "SEE ALSO"
+.BR tuned (8)
+.BR tuned\-adm (8)
+.BR tuned\-profiles (7)
+.BR tuned\-profiles\-sap (7)
+.BR tuned\-profiles\-sap\-hana (7)
+.BR tuned\-profiles\-oracle (7)
+.BR tuned\-profiles\-mssql (7)
+.BR tuned\-profiles\-atomic (7)
+.BR tuned\-profiles\-realtime (7)
+.BR tuned\-profiles\-nfv\-host (7)
+.BR tuned\-profiles\-nfv\-guest (7)
+.BR tuned\-profiles\-cpu\-partitioning (7)
+.BR tuned\-profiles\-compat (7)
+.SH AUTHOR
+.nf
+Jaroslav Škarvada <jskarvad@redhat.com>
+Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>

man/tuned-profiles-realtime.7

@@ -50,6 +50,7 @@ Profile optimized for realtime.
 .BR tuned\-profiles\-nfv\-guest (7)
 .BR tuned\-profiles\-cpu\-partitioning (7)
 .BR tuned\-profiles\-compat (7)
+.BR tuned\-profiles\-postgresql (7)
 .SH AUTHOR
 .nf
 Jaroslav Škarvada <jskarvad@redhat.com>

man/tuned-profiles-sap-hana.7

@@ -55,6 +55,7 @@ semaphores.
 .BR tuned\-profiles\-nfv\-guest (7)
 .BR tuned\-profiles\-cpu-partitioning (7)
 .BR tuned\-profiles\-compat (7)
+.BR tuned\-profiles\-postgresql (7)
 .SH AUTHOR
 .nf
 Jaroslav Škarvada <jskarvad@redhat.com>

man/tuned-profiles-sap.7

@@ -53,6 +53,7 @@ areas a process may have.
 .BR tuned\-profiles\-nfv\-guest (7)
 .BR tuned\-profiles\-cpu\-partitioning (7)
 .BR tuned\-profiles\-compat (7)
+.BR tuned\-profiles\-postgresql (7)
 .SH AUTHOR
 .nf
 Jaroslav Škarvada <jskarvad@redhat.com>

man/tuned-profiles-spectrumscale-ece.7

@@ -53,6 +53,7 @@ performance related kernel parameters.
 .BR tuned\-profiles\-nfv\-guest (7)
 .BR tuned\-profiles\-cpu\-partitioning (7)
 .BR tuned\-profiles\-compat (7)
+.BR tuned\-profiles\-postgresql (7)
 .SH AUTHOR
 .nf
 Luis Bolinches <luis.bolinches@fi.ibm.com>

man/tuned-profiles.7

@@ -153,6 +153,7 @@ profiles (e.g. throughput\-performance profile), example:
 .BR tuned\-profiles\-nfv\-guest (7)
 .BR tuned\-profiles\-cpu\-partitioning (7)
 .BR tuned\-profiles\-compat (7)
+.BR tuned\-profiles\-postgresql (7)
 .SH AUTHOR
 .nf
 Jaroslav Škarvada <jskarvad@redhat.com>

profiles/postgresql/tuned.conf

@@ -0,0 +1,55 @@
+#
+# tuned configuration for PostgreSQL servers
+#
+
+[main]
+summary=Optimize for PostgreSQL server
+include=throughput-performance
+
+[cpu]
+# The alternation of CPU bound load and disk IO operations of postgresql
+# db server suggest CPU to go into powersave mode.
+#
+# Explicitly disable deep c-states to reduce latency on OLTP workloads.
+force_latency=1
+
+[vm]
+transparent_hugepages=never
+
+[sysctl]
+# ktune sysctl settings for rhel6 servers, maximizing i/o throughput
+#
+# Minimal preemption granularity for CPU-bound tasks:
+# (default: 1 msec#  (1 + ilog(ncpus)), units: nanoseconds)
+kernel.sched_min_granularity_ns=10000000
+
+# The dirty_background_ratio and dirty_ratio controls percentage of memory
+# that file system cache have to fill with dirty data before kernel will
+# will start to flush data to disks. The default values are 10% and 20%
+# accordingly. On a systems with a big amount of memory this values can
+# be tens of gigabytes and produce IO spikes when PostgreSQL server writes
+# checkpoints.
+#
+# Keep this values reasonable small - about size of RAID controller write-back
+# cache size (typcal 512MB - 2GB).
+vm.dirty_background_ratio = 0
+vm.dirty_ratio = 0
+vm.dirty_background_bytes = 67108864
+vm.dirty_bytes = 536870912
+
+# The swappiness parameter controls the tendency of the kernel to move
+# processes out of physical memory and onto the swap disk.
+# 0 tells the kernel to avoid swapping processes out of physical memory
+# for as long as possible
+# 100 tells the kernel to aggressively swap processes out of physical memory
+# and move them to swap cache
+vm.swappiness=3
+
+# The total time the scheduler will consider a migrated process
+# "cache hot" and thus less likely to be re-migrated
+# (system default is 500000, i.e. 0.5 ms)
+kernel.sched_migration_cost_ns=50000000
+
+# The autogroup feature of the CFS
+# (system default is 1, e.q enabled)
+kernel.sched_autogroup_enabled = 0

tuned.spec

@@ -237,6 +237,13 @@ Requires: %{name} = %{version}
 Additional tuned profiles mainly for backward compatibility with tuned 1.0.
 It can be also used to fine tune your system for specific scenarios.
 
+%package profiles-postgresql
+Summary: Additional tuned profile(s) targeted to PostgreSQL server loads
+Requires: %{name} = %{version}
+
+%description profiles-postgresql
+Additional tuned profile(s) targeted to PostgreSQL server loads.
+
 %prep
 %setup -q -n %{name}-%{version}%{?prerel2}
 
@@ -391,6 +398,7 @@ fi
 %exclude %{_prefix}/lib/tuned/realtime-virtual-host
 %exclude %{_prefix}/lib/tuned/cpu-partitioning
 %exclude %{_prefix}/lib/tuned/spectrumscale-ece
+%exclude %{_prefix}/lib/tuned/postgresql
 %{_prefix}/lib/tuned
 %dir %{_sysconfdir}/tuned
 %dir %{_sysconfdir}/tuned/recommend.d
@@ -518,6 +526,11 @@ fi
 %{_prefix}/lib/tuned/spindown-disk
 %{_mandir}/man7/tuned-profiles-compat.7*
 
+%files profiles-postgresql
+%defattr(-,root,root,-)
+%{_prefix}/lib/tuned/postgresql
+%{_mandir}/man7/tuned-profiles-postgresql.7*
+
 %changelog
 * Mon Jun 15 2020 Jaroslav Škarvada <jskarvad@redhat.com> - 2.14.0-1
 - new release