How do I resolve the rac gc blocks lost event?

Recently, The company system will service the customers, I inspected the rac health, and then I found:
SQL> select * from gv$sysstat where name like 'gc blocks lost';

   INST_ID STATISTIC# NAME                      CLASS      VALUE    STAT_ID
---------- ---------- -------------------- ---------- ---------- ----------
         2        160 gc blocks lost               40   36100188  500461751
         1        160 gc blocks lost               40   10914865  500461751
#  netstat -s | grep dropped
                0 bad TCP segments dropped due to state change
        123 embryonic connections dropped
                37 connections dropped by rexmit timeout
                105 connections dropped by keepalive
        0 connect requests dropped due to full queue
        17825 connect requests dropped due to no listener
        0 suspect connect requests dropped due to aging
        0 suspect connect requests dropped due to rate