remove USR1 "Save internal DB to disk" (#17249)

(cherry picked from commit 5ea9665)

src/daemon/README.md

@@ -110,7 +110,6 @@ The command line options of the Netdata 1.10.0 version are the following:
  Signals netdata handles:
 
   - HUP                    Close and reopen log files.
-  - USR1                   Save internal DB to disk.
   - USR2                   Reload health configuration.
 ```
 

src/daemon/main.c

@@ -820,7 +820,6 @@ int help(int exitcode) {
 
     fprintf(stream, "\n Signals netdata handles:\n\n"
             "  - HUP                    Close and reopen log files.\n"
-            "  - USR1                   Save internal DB to disk.\n"
             "  - USR2                   Reload health configuration.\n"
             "\n"
     );

system/freebsd/rc.d/netdata.in

@@ -17,10 +17,9 @@ required_files="@configdir_POST@/netdata.conf"
 start_precmd="netdata_prestart"
 stop_postcmd="netdata_poststop"
 
-extra_commands="reloadhealth savedb"
+extra_commands="reloadhealth"
 
 reloadhealth_cmd="netdata_reloadhealth"
-savedb_cmd="netdata_savedb"
 
 netdata_prestart()
 {
@@ -42,12 +41,5 @@ netdata_reloadhealth()
     return 0
 }
 
-netdata_savedb()
-{
-    p=`cat ${pidfile}`
-    kill -USR2 ${p} && echo "Sent USR1 (save db) to pid ${p}"
-    return 0
-}
-
 load_rc_config $name
 run_rc_command "$1"

system/openrc/init.d/netdata.in

@@ -6,10 +6,9 @@ NETDATA_PIDFILE="@localstatedir_POST@/run/netdata/netdata.pid"
 
 description="Run the Netdata system monitoring agent."
 
-extra_started_commands="reload rotate save"
+extra_started_commands="reload rotate"
 description_reload="Reload health configuration."
 description_rotate="Reopen log files."
-description_save="Force sync of database to disk."
 
 command_prefix="@sbindir_POST@"
 command="${command_prefix}/netdata"
@@ -70,10 +69,3 @@ rotate() {
             "Failed to reopen Netdata log files" \
             SIGHUP
 }
-
-save() {
-    run_cmd save-database \
-            "Saving Netdata database" \
-            "Failed to save Netdata database" \
-            SIGUSR1
-}