开始

IndexWriter.commit()

u35_seg0 u35_seg1

开始

IndexWriter.prepareCommit()

u38_seg0

是否存在

pendingCommit

执行第一阶段提交

执行第二阶段提交

u42_seg0
u43_seg0
u44_seg0 u44_seg1 u44_seg2 u44_seg3 u44_seg4
u45_seg0 u45_seg1 u45_seg2 u45_seg3 u45_seg4
u46_seg0 u46_seg1 u46_seg2 u46_seg3

尝试段合并

结束

u49_seg0 u49_seg1
u50_seg0 u50_seg1 u50_seg2 u50_seg3

IndexWriter.commit()

IndexWriter.prepareCommit()

尝试段合并

结束

u55_seg0 u55_seg1
u56_seg0 u56_seg1