You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@geode.apache.org by "Anthony Baker (JIRA)" <ji...@apache.org> on 2016/01/15 07:14:57 UTC
[jira] [Closed] (GEODE-229) Javadocs for
DiskStoreFactory.setCompactionThreshold are incorrect
[ https://issues.apache.org/jira/browse/GEODE-229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Anthony Baker closed GEODE-229.
-------------------------------
> Javadocs for DiskStoreFactory.setCompactionThreshold are incorrect
> ------------------------------------------------------------------
>
> Key: GEODE-229
> URL: https://issues.apache.org/jira/browse/GEODE-229
> Project: Geode
> Issue Type: Bug
> Reporter: Dan Smith
> Assignee: Dan Smith
> Fix For: 1.0.0-incubating.M1
>
>
> The javadocs for compaction-threshold imply that we compact as soon as the amount of garbage is equal or greater than the threshold.
> From DiskStoreFactory?.setCompactionThreshold
> {noformat}
> When the amount of garbage in an oplog exceeds this percentage then when a compaction
> * is done this garbage will be cleaned up freeing up disk space. Garbage is created by
> * entry destroys, entry updates, and region destroys.
> {noformat}
> However, looking at the code, it looks like we actually trigger compaction when the amount of non-garbage data is equal or less than the threshold:
> Here Oplog.needsCompaction, it looks like its saying the oplog needs compaction if the live count is less than the threshold.
> {code}
> long rvHWMtmp = this.totalCount.get();
> if (rvHWMtmp > 0) {
> long tlc = this.totalLiveCount.get();
> if (tlc < 0) {
> tlc = 0;
> }
> double rv = tlc;
> double rvHWM = rvHWMtmp;
> if (((rv / rvHWM) * 100) <= parent.getCompactionThreshold()) {
> return true;
> }
> }
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)