adding NICE and NICE_VAL and ability to override backup numbers in config

dbbackup-docker-compose

@@ -22,9 +22,11 @@ BU_FROOT_WEEKLY=weekly
 BU_FROOT_MONTHLY=monthly
 BU_FROOT_YEARLY=yearly
 #
+# Set backup priority: -20 highest, 0 default, 19 lowest
+NICE_VAL=0
 # this can be overridden at invocation
 BU_CONF=default-docker-compose.conf
-# # output for debugging...
+# output for debugging... 0 = false, 1 = true
 VERBOSE=0
 #
 # Stuff that should be universal for this install...
@@ -49,6 +51,8 @@ MAIL=`which mail`
 # database dump utility
 DC=`which docker-compose`
 #DEF_ARGS="-C -d -O -x"
+# nice
+NICE=`which nice`
 #
 # pattern for "ls" command to build list of
 # pruneable backup files...
@@ -142,7 +146,7 @@ do_backup() {
    echo "-- PostgreSQL Version: $VER" >> $FILE
    echo "--" >> $FILE
    echo "" >> $FILE
-   CMD="$DC exec $CONTAINER $DUMP_CMD"
+   CMD="$NICE -${NICE_VAL} $DC exec $CONTAINER $DUMP_CMD"
    verbose "doing database dump: $CMD"
    $CMD >> $FILE
 }
@@ -230,7 +234,7 @@ do_backup $FILEPATH $DC_CONTAINER
 message "completed backup"
 # compress the backup
 message "compressing $FILEPATH"
-$GZIP $FILEPATH
+$NICE -${NICE_VAL} $GZIP $FILEPATH
 # return to where you started from...
 cd $OLD_DIR
 #