## 1.13. Table: `sl_setsync`

SYNC information

Structure of `sl_setsync`

`ssy_setid`

  `integer` `PRIMARY KEY` `REFERENCES` sl_set>

  ID number of the replication set

`ssy_origin`

  `integer` `REFERENCES` sl_node>

  ID number of the node

`ssy_seqno`

  `bigint`

  Slony-I sequence number

`ssy_minxid`

  `xxid`

  Earliest XID in provider system affected by SYNC

`ssy_maxxid`

  `xxid`

  Latest XID in provider system affected by SYNC

`ssy_xip`

  `text`

  Contains the list of XIDs in progress at SYNC time

`ssy_action_list`

  `text`

  action list used during the subscription process. At the time a subscriber copies over data from the origin, it sees all tables in a state somewhere between two SYNC events. Therefore this list must contains all XIDs that are visible at that time, whose operations have therefore already been included in the data copied at the time the initial data copy is done. Those actions may therefore be filtered out of the first SYNC done after subscribing.