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https://issues.apache.org/jira/browse/HBASE-5907?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13266739#comment-13266739
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Kannan Muthukkaruppan commented on HBASE-5907:
----------------------------------------------
Sample run:
{code}
% bin/hbase org.apache.hadoop.hbase.regionserver.wal.HLog --dump <PathToHLog>
--analyze
=== SUMMARY ===
Number of txns: 49398
Number of KVs: 943861
Total Size of KVs: 244004297
Avg number of KVs/txn: 19
Avg size of txn: 4939
Avg size of KV: 258
Avg CFs written to per txn: 5
Txns/sec: 380
KVs/sec: 7279
======= CF Level Stats ======
# of KVs|CF Name
372739 test_table:cf1
257880 test_table:cf3
82845 test_table:cf2
72649 test_table:cf7
38224 test_table:cf4
36213 test_table:cf6
29446 test_table:cf10
26787 test_table:cf5
26787 test_table:cf9
288 test_table:cf8
3 test_table:METAFAMILY
=====
Total KVSize|CF Name
56814996 test_table:cf3
51452389 test_table:cf6
42377022 test_table:cf1
39258289 test_table:cf4
31404256 test_table:cf2
9814939 test_table:cf7
4727038 test_table:cf9
4708267 test_table:cf10
3412347 test_table:cf5
34592 test_table:cf8
162 test_table:METAFAMILY
=====
== TxnCount|Put/Delete's CF Signature ==
26602 test_table:[cf1, cf2, cf3, cf4, cf5, cf6, cf7, cf9, cf10]
12247 test_table:[cf3]
9311 test_table:[cf3, cf4, cf6]
937 test_table:[cf3, cf4]
176 test_table:[cf1, cf2, cf3, cf4, cf5, cf6, cf7, cf8, cf9, cf10]
110 test_table:[cf2, cf3, cf4, cf6, cf7, cf8, cf10]
9 test_table:[cf2, cf3, cf4, cf5, cf6, cf9, cf10]
3 test_table:[METAFAMILY]
2 test_table:[cf3, cf4, cf6, cf7]
1 test_table:[cf3, cf8]
===========================
{code}
> enhance HLog pretty printer to print additional useful stats
> ------------------------------------------------------------
>
> Key: HBASE-5907
> URL: https://issues.apache.org/jira/browse/HBASE-5907
> Project: HBase
> Issue Type: Improvement
> Reporter: Kannan Muthukkaruppan
> Priority: Minor
> Attachments: D2979.1.patch, D2979.2.patch
>
>
> It would be useful for analysis purposes to enhance the HLog pretty printer
> to optionally print a bunch of additional stats such as:
> 1) # of txns
> 2) # of KVs updated
> 3) avg size of txns
> 4) avg size of KVs
> 5) avg # of KVs written per txn
> 5) unique CF signatures involved in put/delete operatons; and breakdown of
> some of the above metrics by these signatures, etc.
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