diff options
| author | Ondrej Zajicek <santiago@crfreenet.org> | 2022-06-04 17:34:57 +0200 |
|---|---|---|
| committer | Ondrej Zajicek <santiago@crfreenet.org> | 2022-06-04 17:34:57 +0200 |
| commit | a8a3d95be5db1a8a7d5a17e2eb8e233417b1d8c7 (patch) | |
| tree | c91bd47eaf319a54af76ef74b1a1283621fc2676 /doc/bird.sgml | |
| parent | 9e60b500c76945ccdea94d3a67e7acfde5e3f969 (diff) | |
Nest: Improve GC strategy for rtables
Use timer (configurable as 'gc period') to schedule routing table
GC/pruning to ensure that prune is done on time but not too often.
Randomize GC timers to avoid concentration of GC events from different
tables in one loop cycle.
Fix a bug that caused minimum inter-GC interval be 5 us instead of 5 s.
Make default 'gc period' adaptive based on number of routing tables,
from 10 s for small setups to 600 s for large ones.
In marge multi-table RS setup, the patch improved time of flushing
a downed peer from 20-30 min to <2 min and removed 40s latencies.
Diffstat (limited to 'doc/bird.sgml')
| -rw-r--r-- | doc/bird.sgml | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml index 1580facd..326fc7a8 100644 --- a/doc/bird.sgml +++ b/doc/bird.sgml @@ -684,6 +684,21 @@ to set options. limit to the settle time from the initial ROA table change even if there are consecutive updates gradually renewing the settle time. Default: 20 s. + + <tag><label id="rtable-gc-threshold">gc threshold <m/number/</tag> + Specify a minimum amount of removed networks that triggers a garbage + collection (GC) cycle. Default: 1000. + + <tag><label id="rtable-gc-period">gc period <m/time/</tag> + Specify a period of time between consecutive GC cycles. When there is a + significant amount of route withdraws, GC cycles are executed repeatedly + with given period time (with some random factor). When there is just + small amount of changes, GC cycles are not executed. In extensive route + server setups, running GC on hundreds of full BGP routing tables can + take significant amount of time, therefore they should use higher GC + periods. Default: adaptive, based on number of routing tables in the + configuration. From 10 s (with <= 25 routing tables) up to 600 s (with + >= 1500 routing tables). </descrip> |