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profiles: added SAP profile

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Also added support for the sysctl tunings taken from the
environment and conditional tunings (i.e. not to change
the sysctl settings if the current value is greater than
the new value).

To use the environment variable SEM:
kernel.sem = $SEM

To set the kernel.shmall only if the current value is less
than the 1000000:
kernel.shmall = >$1000000

Both can be combined, e.g.:
kernel.shmall = >$SHMALL

Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
This commit is contained in:
Jaroslav Škarvada 2013-07-24 14:09:48 +02:00
parent 43eb6315c1
commit 438c1335da
3 changed files with 48 additions and 9 deletions
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4
doc/tuned-adm.1
View file

@ -101,6 +101,10 @@ Profile optimized for virtual guests based on enterprise-storage profile. It add
.BI "virtual-host"
Profile optimized for virtual hosts based on enterprise-storage profile. It additionally decreases virtual memory swapiness and enables more aggresive writeback of dirty pages.
.TP
.BI "sap"
Profile optimized for the best performance of SAP software. It is based on enterprise-storage profile. It additionally tunes sysctl settings regarding shared memory, semaphores and maximum number of memory map areas a process may have.
.SH "FILES"
.nf
/etc/tune-profiles/*

8
ktune/README.ktune
View file

@ -48,6 +48,7 @@ service is enabled and started, it will use the configuration options from
SYSCTL="/etc/sysctl.ktune"
USE_KTUNE_D="yes"
SYSCTL_PRE="/etc/sysctl.d/* /etc/sysctl.conf"
SYSCTL_POST="/etc/sysctl.d/* /etc/sysctl.conf"
ELEVATOR="deadline"
ELEVATOR_TUNE_DEVS="/sys/block/{sd,cciss}*/queue/scheduler"
@ -60,7 +61,12 @@ profiles from the /etc/ktune.d directory. A profile has to have the extension
.conf to be used. If there is an additional file with the same name, but the
extension .sh it will be used as a profile script.
SYSCTL_POST references the system wide sysctl file for customer settings.
SYSCTL_PRE references the system wide sysctl file for customer settings that
is loaded before the ktune tunings. The tunings from this file may be
overridden by ktune settings. Most profile don't use this option.
SYSCTL_POST references the system wide sysctl file for customer settings that
is loaded after the ktune tunings. This may override the ktune settings.
ELEVATOR is the I/O scheduler, ktune will set for ELEVATOR_TUNE_DEVS. If you
want to disable the setting of the I/O scheduler, just comment out the ELEVATOR

45
ktune/ktune.init
View file

@ -67,9 +67,15 @@ $(LANG=C /bin/ls -1 /etc/ktune.d/*.conf 2>/dev/null)
EOF
fi
function is_int
{
[ ! -z "${1##*[^0-9]*}" ]
}
load_file() {
local file=$1
local save=$2
local curr_value
ret_s=0
errors=
@ -81,19 +87,34 @@ load_file() {
key=$(echo $line | awk '{ match($0,"[ \t]*=[ \t]*") && $0=substr($0,1,RSTART-1); print $0}')
value=$(echo $line | awk '/=/ { match($0,"[ \t]*=[ \t]*"); $0=substr($0,RSTART+RLENGTH); print $0}')
curr_value=""
if [ "${value:0:1}" = '>' ]; then
value=${value:1}
curr_value=$($SYSCTL_GET -n "$key")
fi
if [ "${value:0:1}" = '$' ]; then
value=${value:1}
value=${!value}
fi
is_int "$curr_value" && is_int "$value" && [ "$value" -lt "$curr_value" ] && value="$curr_value"
[ $save -ne 0 ] && save_value=$($SYSCTL_GET "$key")
setting=$key
[ -n "$value" ] && setting+="=${value}"
if [ "$value" ]; then
[ -n "$value" ] && setting+="=${value}"
error="$($SYSCTL_SET "${setting}" 2>&1)"
ret=$?
if [ $save -ne 0 -a $ret -eq 0 ] && ! grep -q "^${key} =" $SAVE_FILE 2>/dev/null; then
echo "$save_value" >> "$SAVE_FILE"
error="$($SYSCTL_SET "${setting}" 2>&1)"
ret=$?
if [ $save -ne 0 -a $ret -eq 0 ] && ! grep -q "^${key} =" $SAVE_FILE 2>/dev/null; then
echo "$save_value" >> "$SAVE_FILE"
fi
[ -n "$error" ] && errors+="${error}\n"
let ret_s+=$ret
fi
[ -n "$error" ] && errors+="${error}\n"
let ret_s+=$ret
done < "$file"
if [ $ret_s -eq 0 ]; then
@ -126,6 +147,14 @@ load_sysctl() {
/bin/rm -f "$SAVE_FILE"
if [ ${#KTUNE_FILES[@]} -gt 0 ]; then
# Apply general sysctl settings beforehand
for f in $SYSCTL_PRE; do
if [ -r "$f" ]; then
echo $"Applying sysctl settings from $f"
sysctl -e -p "$f" >/dev/null 2>&1
fi
done
echo $"Applying ktune sysctl settings:"
# Apply ktune files.