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HBASE-26590 Hbase-client Meta lookup performance regression between hbase-1 and hbase-2 (#4008) (#4012) 

Change scan caching back to 1 to avoid extra work at Region Server side. For most cases, the extra 4 results
fetched are wasted at the client side.

Signed-off-by: Duo Zhang <zhangduo@apache.org>
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huaxiangsun 2022-01-06 11:55:51 -08:00 committed by GitHub
parent 53f8240b9f
commit f3639bc80c
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hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java
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@ -888,7 +888,7 @@ class ConnectionImplementation implements ClusterConnection, Closeable {
byte[] metaStopKey =
RegionInfo.createRegionName(tableName, HConstants.EMPTY_START_ROW, "", false);
Scan s = new Scan().withStartRow(metaStartKey).withStopRow(metaStopKey, true)
.addFamily(HConstants.CATALOG_FAMILY).setReversed(true).setCaching(5)
.addFamily(HConstants.CATALOG_FAMILY).setReversed(true).setCaching(1)
.setReadType(ReadType.PREAD);
switch (this.metaReplicaMode) {