es这是在回收内存吗？

[monitor.jvm              ] [node3] [gc][young][1181668][4790] duration [5.6s], collections [1]/[6.4s], total [5.6s]/[26.2m], memory [18.1gb]->[10.1gb]/[23.9gb], all_pools {[young] [7.9gb]->[7.3mb]/[8gb]}{[survivor] [91.4mb]->[124.6mb]/[164mb]}{[old] [10gb]->[10gb]/[16.6gb]}