At the time of
sitecore_master_index rebuild (full reindexing or on update) we can see multiple
sitecore_master_index entries in the index job queue. Can anyone explain the reason for this?
When you use
syncMaster strategy for
sitecore_master_index, every time you save something in
master database (or Sitecore itself saves a page, like e.g. information about last execution or scheduled job, changing the state of EXM message, any datasource change), a new backed job is created to updated
By default Sitecore does not allow to update same index in parallel. It means that when your
sitecore_master_index is being fully rebuilt, for like 12 minutes - as on your screenshot, all the partial updates of index triggered by updates of single items, they will be queued.
So in summary: every queued job you see there means that there was a save of a Sitecore item in
master database during the time your
sitecore_master_index was being rebuilt.