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Add pageserver checkpoint_timeout option.

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To flush inmemory layer eventually when no new data arrives, which helps
safekeepers to suspend activity (stop pushing to the broker). Default 10m should
be ok.
This commit is contained in:
Arseny Sher
2022-08-08 12:47:50 +03:00
parent 4b9e02be45
commit e593cbaaba
15 changed files with 106 additions and 21 deletions
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12
docs/settings.md
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@@ -15,7 +15,7 @@ listen_pg_addr = '127.0.0.1:64000'
listen_http_addr = '127.0.0.1:9898'
checkpoint_distance = '268435456' # in bytes
checkpoint_period = '1 s'
checkpoint_timeout = '10m'
gc_period = '100 s'
gc_horizon = '67108864'
@@ -46,7 +46,7 @@ Note the `[remote_storage]` section: it's a [table](https://toml.io/en/v1.0.0#ta
All values can be passed as an argument to the pageserver binary, using the `-c` parameter and specified as a valid TOML string. All tables should be passed in the inline form.
Example: `${PAGESERVER_BIN} -c "checkpoint_period = '100 s'" -c "remote_storage={local_path='/some/local/path/'}"`
Example: `${PAGESERVER_BIN} -c "checkpoint_timeout = '10 m'" -c "remote_storage={local_path='/some/local/path/'}"`
Note that TOML distinguishes between strings and integers, the former require single or double quotes around them.
@@ -82,6 +82,14 @@ S3.
The unit is # of bytes.
#### checkpoint_timeout
Apart from `checkpoint_distance`, open layer flushing is also triggered
`checkpoint_timeout` after the last flush. This makes WAL eventually uploaded to
s3 when activity is stopped.
The default is 10m.
#### compaction_period
Every `compaction_period` seconds, the page server checks if