checkpoint_wal_threshold doesn't account WALs created before a restart #9811
Description
Bug description
The wal size counter since last checkpoint is reset to 0 on instance restart.
Steps to reproduce
- Set
box.cfg{wal_max_size=512, checkpoint_wal_threshold=10*512}-- there should be approximately 10 xlogs between checkpoints. - write some data, restart the instance, write some more data.
- Check the created xlogs and snaps:
-rw-r--r-- 1 s.petrenko staff 5,0K 14 мар 11:22 00000000000000001426.snap <-- first snap
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:22 00000000000000001426.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:22 00000000000000001434.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:22 00000000000000001442.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:22 00000000000000001450.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:22 00000000000000001458.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:22 00000000000000001466.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:22 00000000000000001474.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:22 00000000000000001482.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:22 00000000000000001490.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001498.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001506.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001514.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001522.xlog
-rw-r--r-- 1 s.petrenko staff 379B 14 мар 11:23 00000000000000001530.xlog
-rw-r--r-- 1 s.petrenko staff 5,0K 14 мар 11:23 00000000000000001535.snap <-- next snap after 14 xlogs (it's not clear why 14 and not 10)
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001535.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001543.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001551.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001559.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001567.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001575.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001583.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001591.xlog
-rw-r--r-- 1 s.petrenko staff 191B 14 мар 11:23 00000000000000001599.xlog <-- restart happened here
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001600.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001608.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001616.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001624.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001632.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001640.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001648.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001656.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001664.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001672.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001680.xlog
-rw-r--r-- 1 s.petrenko staff 520B 14 мар 11:23 00000000000000001688.xlog
-rw-r--r-- 1 s.petrenko staff 328B 14 мар 11:23 00000000000000001696.xlog <-- no snap for 22 xlogs.