diff options
Diffstat (limited to 'scripts/mysqld_safe.sh')
| -rw-r--r-- | scripts/mysqld_safe.sh | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/scripts/mysqld_safe.sh b/scripts/mysqld_safe.sh index 2860acf4932..20e5e115687 100644 --- a/scripts/mysqld_safe.sh +++ b/scripts/mysqld_safe.sh @@ -748,17 +748,55 @@ cmd="$cmd $args" test -n "$NOHUP_NICENESS" && cmd="$cmd < /dev/null" log_notice "Starting $MYSQLD daemon with databases from $DATADIR" + +# variable to track the current number of "fast" (a.k.a. subsecond) restarts +fast_restart=0 +# maximum number of restarts before trottling kicks in +max_fast_restarts=5 +# flag whether a usable sleep command exists +have_sleep=1 + while true do rm -f $safe_mysql_unix_port "$pid_file" # Some extra safety + start_time=`date +%M%S` + eval_log_error "$cmd" + end_time=`date +%M%S` + if test ! -f "$pid_file" # This is removed if normal shutdown then break fi + + # sanity check if time reading is sane and there's sleep + if test $end_time -gt 0 -a $have_sleep -gt 0 + then + # throttle down the fast restarts + if test $end_time -eq $start_time + then + fast_restart=`expr $fast_restart + 1` + if test $fast_restart -ge $max_fast_restarts + then + log_notice "The server is respawning too fast. Sleeping for 1 second." + sleep 1 + sleep_state=$? + if test $sleep_state -gt 0 + then + log_notice "The server is respawning too fast and no working sleep command. Turning off trottling." + have_sleep=0 + fi + + fast_restart=0 + fi + else + fast_restart=0 + fi + fi + if @TARGET_LINUX@ && test $KILL_MYSQLD -eq 1 then # Test if one process was hanging. |