skibler wrote:
> Since installing LMS in newer distro's is becoming more of a pain, I
> have created a simple CentOS VM to host LMS 7.7. Without much thought I
> gave it 768MB ram and a single core of an Intel Q6600 and it runs great.
> The swap partition in the guest is 1.5GB, and I imagine I could probably
> shrink that? The smaller the VM image, the better. It is on an SSD,
> which can't hurt.
>
> How low can I drop the ram before it will really affect the performance?
> My library.db is 44MB, my persist.db is 158MB, and the artwork.db is
> 520MB, if those matter.
You might try running this script in your VM and see what sort of
results you get.
memwatch:
Code:
--------------------
#!/bin/bash
# Regular expression process search string, e.g. 'perl.*squeeze'
PROCRE="$1"
if [ -z "$PROCRE" ]; then
echo "sudo $(basename $0) 'pgrep_regex' [--pmap '2nd_regex']"
exit 1
fi
MemDesc=('All memory the process uses, including all memory this process
shares with other processes' \
"Memory that this process shares with other processes" \
"Private memory used by this process" \
"Swap memory used by the process" \
"Proportional Set Size, a good overall memory indicator" \
"Virtual size, almost meaningless" \
"Memory currently marked as referenced or accessed")
# Find the processes, excluding this bash instance..
PIDS=$(pgrep -f "$PROCRE" | egrep -v "$$")
# Count of the processes we find..
PCOUNT=0
for PID in $PIDS
do
if [ -e "/proc/${PID}/smaps" ]; then
let PCOUNT++
PROC=$(pgrep -fl "$PROCRE" | egrep "^$PID")
echo ' '
echo "Memory usage for ${PROC}"
echo
"======================================================================================================================"
# Alternate way, watching must SQLite.so:
if [ "$2" = '--pmap' ]; then
if [ -z "$3" ]; then
pmap -x $PID
else
pmap -x $PID | egrep -i "^Address|${3}"
fi
exit 0
fi
COUNT=0
for MEMTYPE in Rss Shared Private Swap Pss Size Referenced
do
USAGE=`echo 0 $(cat "/proc/${PID}/smaps" | grep
${MEMTYPE} | awk '{print $2}' | sed 's#^#+#') | bc`
printf "%10s usage: %'8d" $MEMTYPE $USAGE
echo " ${MemDesc[$COUNT]}"
#COUNT=${COUNT}+1
#COUNT=$((${COUNT}+1))
let COUNT++
done
echo ' '
fi
done
if [ ${PCOUNT} -eq 0 ]; then
echo "Error: can't find a running process that matches '${PROCRE}'"
exit 1
fi
exit 0
--------------------
Try:
# memwatch 'perl.*squeeze'
..and see what it has to say. On my ubuntu 12.04 box with 8gb RAM (and
running UEML 10.01 from the git code),
# memwatch 'perl.*slimserver.pl'
Code:
--------------------
Memory usage for 32456 /usr/bin/perl /usr/share/lms/server/slimserver.pl
--prefsdir /var/lib/lms/prefs --logdir /var/log/lms/ --cachedir
/var/lib/lms/cache --charset=utf8 --norestart
======================================================================================================================
Rss usage: 156,472 All memory the process uses, including all memory this
process shares with other processes
Shared usage: 1,572 Memory that this process shares with other processes
Private usage: 154,900 Private memory used by this process
Swap usage: 8 Swap memory used by the process
Pss usage: 155,156 Proportional Set Size, a good overall memory indicator
Size usage: 263,480 Virtual size, almost meaningless
Referenced usage: 146,248 Memory currently marked as referenced or accessed
--------------------
------------------------------------------------------------------------
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