ops: Add new nginx hot cacher

production/mempool-start-all

@@ -24,7 +24,13 @@ done
 # start nginx warm cacher
 for site in mainnet;do
     echo "starting mempool cache warmer: ${site}"
-    screen -dmS "warmer-${site}" $HOME/mainnet/production/nginx-cache-warmer
+    screen -dmS "warmer-${site}" $HOME/mempool/production/nginx-cache-warmer
+done
+
+# start nginx hot cacher
+for site in mainnet;do
+    echo "starting mempool cache heater: ${site}"
+    screen -dmS "heater-${site}" $HOME/mempool/production/nginx-cache-heater
 done
 
 exit 0

production/nginx-cache-warmer

@@ -39,7 +39,6 @@ warmUnfurlURLs=(
 )
 
 warmURLs=(
-	'/api/v1/fees/recommended'
 	'/api/v1/blocks'
 	'/api/v1/statistics/2h'
 	'/api/v1/statistics/24h'

production/nginx/location-api.conf

@@ -23,7 +23,7 @@ location /api/v1/mining {
 	try_files /dev/null @mempool-api-v1-cache-warm;
 }
 location /api/v1/fees/recommended {
-	try_files /dev/null @mempool-api-v1-cache-warm;
+	try_files /dev/null @mempool-api-v1-cache-hot;
 }
 
 # it's ok to cache blockchain data "forever", so we do 30d
@@ -84,6 +84,21 @@ location @mempool-api-v1-cache-forever {
 	expires 30d;
 }
 
+location @mempool-api-v1-cache-hot {
+	proxy_pass $mempoolMainnet;
+
+	proxy_set_header Host $host;
+	proxy_set_header X-Real-IP $remote_addr;
+	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+	proxy_set_header X-Forwarded-Proto $scheme;
+
+	proxy_cache_background_update on;
+	proxy_cache_use_stale updating;
+	proxy_cache api;
+	proxy_cache_valid 200 1s;
+	proxy_redirect off;
+}
+
 location @mempool-api-v1-cache-warm {
 	proxy_pass $mempoolMainnet;