Obvious memory reductions (#15204)

* remove rd->update_every

* reduce amount of memory for RRDDIM

* reorgnize rrddim->db entries

* optimize rrdset and statsd

* optimize dictionaries

* RW_SPINLOCK for dictionaries

* fix codeql warning

* rw_spinlock improvements

* remove obsolete assertion

* fix crash on health_alarm_log_process()

* use RW_SPINLOCK for AVL trees

* add RW_SPINLOCK read/write trylock

* pgc and mrg now use rw_spinlocks; cache line optimizations for mrg

* thread tag of dbegnine init

* append created datafile, lockless

* make DOUBLE_LINKED_LIST_APPEND_ITEM_UNSAFE friendly for lockless use

* thread cancelability in spinlocks; optimize thread cancelability management

* introduce a JudyL to index datafiles and use it during queries to quickly find the relevant files

* use the last timestamp of each journal file for indexing

* when the previous cannot be found, start from the beginning

* add more stats to PDC to trace routing easier

* rename spinlock functions

* fix for spinlock renames

* revert statsd socket statistics to size_t

* turn fatal into internal_fatal()

* show candidates always

* show connected status and connection attempts

1 files changed, 4 insertions, 4 deletions

diff --git a/streaming/sender.c b/streaming/sender.c
index 3743889edb..e75ee11896 100644
--- a/streaming/sender.c
+++ b/streaming/sender.c
@@ -258,7 +258,7 @@ static void rrdpush_sender_thread_reset_all_charts(RRDHOST *host) {
 
         RRDDIM *rd;
         rrddim_foreach_read(rd, st)
-            rd->exposed = 0;
+            rrddim_clear_exposed(rd);
         rrddim_foreach_done(rd);
     }
     rrdset_foreach_done(st);
@@ -1188,10 +1188,10 @@ static void rrdpush_sender_thread_cleanup_callback(void *ptr) {
 void rrdpush_initialize_ssl_ctx(RRDHOST *host) {
 #ifdef ENABLE_HTTPS
     static SPINLOCK sp = NETDATA_SPINLOCK_INITIALIZER;
-    netdata_spinlock_lock(&sp);
+    spinlock_lock(&sp);
 
     if(netdata_ssl_streaming_sender_ctx || !host) {
-        netdata_spinlock_unlock(&sp);
+        spinlock_unlock(&sp);
         return;
     }
 
@@ -1207,7 +1207,7 @@ void rrdpush_initialize_ssl_ctx(RRDHOST *host) {
         }
     }
 
-    netdata_spinlock_unlock(&sp);
+    spinlock_unlock(&sp);
 #endif
 }