| From: | Benoit Lobréau <benoit(dot)lobreau(at)dalibo(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> |
| Cc: | "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, Shlok Kyal <shlok(dot)kyal(dot)oss(at)gmail(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, Nitin Motiani <nitinmotiani(at)google(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: long-standing data loss bug in initial sync of logical replication |
| Date: | 2025-02-28 08:28:13 |
| Message-ID: | 2e2b2aba-c285-4bfc-a3bd-c55ac2df9568@dalibo.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Hi,
It took me a while but I ran the test on my laptop with 20 runs per
test. I asked for a dedicated server and will re-run the tests if/when I
have it.
count of partitions | Head (sec) | Fix (sec) | Degradation (%)
----------------------------------------------------------------------
1000 | 0,0265 | 0,028 | 5,66037735849054
5000 | 0,091 | 0,0945 | 3,84615384615385
10000 | 0,1795 | 0,1815 | 1,11420612813371
Concurrent Txn | Head (sec) | Patch (sec) | Degradation in %
---------------------------------------------------------------------
50 | 0,1797647 | 0,1920949 | 6,85907744957
100 | 0,3693029 | 0,3823425 | 3,53086856344
500 | 1,62265755 | 1,91427485 | 17,97158617972
1000 | 3,01388635 | 3,57678295 | 18,67676928162
2000 | 7,0171877 | 6,4713304 | 8,43500897435
I'll try to run test2.pl later (right now it fails).
hope this helps.
--
Benoit Lobréau
Consultant
http://dalibo.com
| Attachment | Content-Type | Size |
|---|---|---|
| cache_inval_bug_v1.ods | application/vnd.oasis.opendocument.spreadsheet | 30.7 KB |
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Michael Paquier | 2025-02-28 08:44:20 | Re: [BUG]: the walsender does not update its IO statistics until it exits |
| Previous Message | Maxim Orlov | 2025-02-28 08:13:29 | Re: Proposal: Limitations of palloc inside checkpointer |