faster sync, drop unconfirmed mempool txs after 1 day

src/cryptonote_config.h

@@ -104,12 +104,12 @@
 
 #define BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT          10000  //by default, blocks ids count in synchronizing
 #define BLOCKS_IDS_SYNCHRONIZING_MAX_COUNT              25000  //max blocks ids count in synchronizing
-#define BLOCKS_SYNCHRONIZING_DEFAULT_COUNT_PRE_V4       100    //by default, blocks count in blocks downloading
+#define BLOCKS_SYNCHRONIZING_DEFAULT_COUNT_PRE_V4       50    //by default, blocks count in blocks downloading
 #define BLOCKS_SYNCHRONIZING_DEFAULT_COUNT              20     //by default, blocks count in blocks downloading
 #define BLOCKS_SYNCHRONIZING_MAX_COUNT                  2048   //must be a power of 2, greater than 128, equal to SEEDHASH_EPOCH_BLOCKS
 
-#define CRYPTONOTE_MEMPOOL_TX_LIVETIME                    (86400*3) //seconds, three days
-#define CRYPTONOTE_MEMPOOL_TX_FROM_ALT_BLOCK_LIVETIME     604800 //seconds, one week
+#define CRYPTONOTE_MEMPOOL_TX_LIVETIME                    86400 //seconds, one day
+#define CRYPTONOTE_MEMPOOL_TX_FROM_ALT_BLOCK_LIVETIME     86400 //seconds, one day
 
 
 #define CRYPTONOTE_DANDELIONPP_STEMS              2 // number of outgoing stem connections per epoch
@@ -141,7 +141,7 @@
 #define P2P_LOCAL_WHITE_PEERLIST_LIMIT                  1000
 #define P2P_LOCAL_GRAY_PEERLIST_LIMIT                   5000
 
-#define P2P_DEFAULT_CONNECTIONS_COUNT                   12
+#define P2P_DEFAULT_CONNECTIONS_COUNT                   64
 #define P2P_DEFAULT_HANDSHAKE_INTERVAL                  60           //secondes
 #define P2P_DEFAULT_PACKET_MAX_SIZE                     50000000     //50000000 bytes maximum packet size
 #define P2P_DEFAULT_PEERS_IN_HANDSHAKE                  250
@@ -154,8 +154,8 @@
 #define P2P_DEFAULT_WHITELIST_CONNECTIONS_PERCENT       70
 #define P2P_DEFAULT_ANCHOR_CONNECTIONS_COUNT            2
 #define P2P_DEFAULT_SYNC_SEARCH_CONNECTIONS_COUNT       2
-#define P2P_DEFAULT_LIMIT_RATE_UP                       2048       // kB/s
-#define P2P_DEFAULT_LIMIT_RATE_DOWN                     8192       // kB/s
+#define P2P_DEFAULT_LIMIT_RATE_UP                       1048576    // 1GB/s
+#define P2P_DEFAULT_LIMIT_RATE_DOWN                     1048576   // 1GB/s
 
 #define P2P_FAILED_ADDR_FORGET_SECONDS                  (60*60)     //1 hour
 #define P2P_IP_BLOCKTIME                                (60*60*24)  //24 hour