Yu Li created HBASE-15619:
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Summary: Performance regression observed: Random read(get)
performance of branch-1 worse than 0.98
Key: HBASE-15619
URL: https://issues.apache.org/jira/browse/HBASE-15619
Project: HBase
Issue Type: Bug
Reporter: Yu Li
Assignee: Yu Li
As titled, I observed the perf regression in the final stress testing before
upgrading our online cluster to 1.x. More details as follows:
1. HBase version in the comparison test:
* 0.98: based on 0.98.12 with some backports, among which HBASE-11297 is the
most important perf-related one (especially under high stress)
* 1.x: checked 3 releases in total
1) 1.1.2 with important perf fixes/improvements including HBASE-15031 and
HBASE-14465 (we planed to upgrade to 1.x since Oct. last year, by when 1.1.2
was the latest stable release in branch-1)
2) 1.1.4 release
3) 1.2.1RC1
2. Test environment
* YCSB: 0.7.0 with
[YCSB-651|https://github.com/brianfrankcooper/YCSB/pull/651] applied
* Client: 4 physical nodes, each with 8 YCSB instance, each instance with
100 threads
* Server: 1 Master with 3 RS, each RS with 256 handlers and 64G heap
* Hardware: 64-core CPU, 256GB Mem, 10Gb Net, 1 PCIe-SSD and 11 HDD, same
hardware for client and server
3. Test cases
* -p fieldcount=1 -p fieldlength=128 -p readproportion=1
* case #1: read against empty table
* case #2: lrucache 100% hit
* case #3: BLOCKCACHE=>false
4. Test result
* 1.1.4 and 1.2.1 have a similar perf (less than 2% deviation) as 1.1.2+, so
will only paste comparison data of 0.98.12+ and 1.1.2+
* per-RS Throughput(ops/s)
||HBaseVersion||case#1||case#2||case#3||
|0.98.12+|383562|257493|47594|
|1.1.2+|363050|232757|35872|
* AverageLatency(us)
||HBaseVersion||case#1||case#2||case#3||
|0.98.12+|2774|4134|22371|
|1.1.2+|2930|4572|29690|
It seems to me each part on the read path has perf regression: RPCServer for
case#1, lrucache read for case#2, and hfile read for case#3...
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