mirror of
https://github.com/haproxy/haproxy.git
synced 2026-03-21 10:00:32 -04:00
8fe0950511
haproxy_sticktable_local_updates corresponds to the table->localupdate counter, which is used internally by the peers protocol to identify update messages in order to send and ack them among peers. Here we decide to expose this information, as it is already the case in "show peers" output, because it turns out that this value, which is cumulative and grows in sync with the number of updates triggered on the table due to changes initiated by the current process, can be used to compute the update rate of the table. Computing the update rate of the table (from the process point of view, ie: updates sent by the process and not those received by the process), can be a great load indicator in order to properly scale the infrastructure that is intended to handle the table updates. Note that there is a pitfall, which is that the value will eventually wrap since it is stored using unsigned 32bits integer. Scripts or system making use of this value must take wrapping into account between two readings to properly compute the effective number of updates that were performed between two readings. Also, they must ensure that the "polling" rate between readings is small enough so that the value cannot wrap behind their back. |
||
|---|---|---|
| .. | ||
| 51degrees | ||
| deviceatlas | ||
| ot | ||
| promex | ||
| wurfl | ||