forked from cockroachdb/cockroach
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
sql/contention/txnidcache: reuse blocks in list, account for space
This change does two things to the txnidcache: 1) It accounts for the space used by the fifo eviction list. Previously we'd use more than double the intended space. We should probably also subtrace out the size of the buffers we're currently filling and the channel we use to communicate them, but I'll leave that for later. 2) It stops trying to compact the blocks. Compacting the blocks ends up being a good deal of overhead because we have to copy across every single message. Instead we can just append the block directly to the list. This does have the hazard of wasting a lot of space when the blocks are sparse. However, if the blocks are sparse, we know that the throughput is low, so it's fine. Resolves cockroachdb#76738 Release justification: bug fixes and low-risk updates to new functionality Release note: None
- Loading branch information
Showing
5 changed files
with
238 additions
and
234 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.