Adjust description of legacy proton metric "proton.diskusage".
The tracked disk usage is for disk indexes (indexed fields), not attribute
vectors, document meta store, document store or transaction log.
@@ -19,7 +19,7 @@ LegacyProtonMetrics::LegacyProtonMetrics()
matchExecutor("matchexecutor", this),
summaryExecutor("summaryexecutor", this),
memoryUsage("memoryusage", "logdefault", "Total tracked memory usage", this),
- diskUsage("diskusage", "logdefault", "Total tracked disk usage", this),
+ diskUsage("diskusage", "logdefault", "Total tracked disk usage for disk indexes", this),
docsInMemory("docsinmemory", "logdefault", "Total Number of documents in memory", this),
numDocs("numdocs", "logdefault", "Total number of ready/indexed documents among all document dbs (equal as numindexeddocs)", this),
numActiveDocs("numactivedocs", "logdefault",
