SR: High Replication Time Lag
In SAP HANA System Replication, a delayed log replay on the secondary system results in a backlog of redo logs waiting to be replayed, potentially increasing takeover time. This delay can be caused by slow log replay processes, non-running services on the secondary, or insufficient resources. 
 
|Database |Host |Port |Service Name |Volume ID |Site ID |Site Name |Secondary |Secondary |Secondary |Secondary |Secondary |Replication |Replication |Replication |Secondary | 
| | | | | | | |Host |Port |Site ID |Site Name |Active Status |Mode |Status |Status Details |Fully Synced | 
|-------- |------ |----- |------------ |--------- |------- |--------- |--------- |--------- |--------- |--------- |------------- |----------- |----------- |-------------- |------------ | 
|SYSTEMDB |dbpfa1 |30001 |nameserver | 1 | 1 |SiteAPFA |dbpfa2 | 30001 | 2 |SiteBPFA |YES |SYNC |ACTIVE | | True | 
|PFB |dbpfa1 |30046 |xsengine | 2 | 1 |SiteAPFA |dbpfa2 | 30046 | 2 |SiteBPFA |YES |SYNC |ACTIVE | | True | 
|PFB |dbpfa1 |30040 |indexserver | 3 | 1 |SiteAPFA |dbpfa2 | 30040 | 2 |SiteBPFA |YES |SYNC |ACTIVE | | True | 
|PFC |dbpfa1 |30049 |indexserver | 2 | 1 |SiteAPFA |dbpfa2 | 30049 | 2 |SiteBPFA |YES |SYNC |ACTIVE | | True | 
|PFB |dbpfa1 |30058 |dpserver | 4 | 1 |SiteAPFA |dbpfa2 | 30058 | 2 |SiteBPFA |YES |SYNC |ACTIVE | | True | 
|SYSTEMDB |dbpfa2 |30001 |nameserver | 1 | 2 |SiteBPFA |dbpfa3 | 30001 | 3 |SiteCPFA |YES |ASYNC |ACTIVE | | True | 
|PFB |dbpfa2 |30046 |xsengine | 2 | 2 |SiteBPFA |dbpfa3 | 30046 | 3 |SiteCPFA |YES |ASYNC |ACTIVE | | True | 
|PFB |dbpfa2 |30040 |indexserver | 3 | 2 |SiteBPFA |dbpfa3 | 30040 | 3 |SiteCPFA |YES |ASYNC |ACTIVE | | True | 
|PFC |dbpfa2 |30049 |indexserver | 2 | 2 |SiteBPFA |dbpfa3 | 30049 | 3 |SiteCPFA |YES |ASYNC |ACTIVE | | True | 
|PFB |dbpfa2 |30058 |dpserver | 4 | 2 |SiteBPFA |dbpfa3 | 30058 | 3 |SiteCPFA |YES |ASYNC |ACTIVE | | True | 
 
status system replication site "2": ACTIVE 
status system replication site "3": ACTIVE 
overall system replication status: ACTIVE 
 
Local System Replication State 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
 
mode: PRIMARY 
site id: 1 
site name: SiteAPFA