"Tom Lane <[EMAIL PROTECTED]>" wrote:
> Katsuhiko Okano <[EMAIL PROTECTED]> writes:
> > It does not solve, even if it increases the number of NUM_SUBTRANS_BUFFERS.
> > The problem was only postponed.
>
> Can you provide a reproducible test case for this?
Seven machines are required in order to perform measurement.
(DB*1,AP*2,CLient*4)
Enough work load was not able to be given in two machines.
(DB*1,{AP+CL}*1)
It was not able to reappear to a multiplex run of pgbench
or a simple SELECT query.
TPC-W of a work load tool used this time is a full scratch.
Regrettably it cannot open to the public.
If there is a work load tool of a free license, I would like to try.
I will show if there is information required for others.
The patch which outputs the number of times of LWLock was used this time.
The following is old example output. FYI.
# SELECT * FROM pg_stat_lwlocks;
kind | pg_stat_get_lwlock_name | sh_call | sh_wait | ex_call |
ex_wait | sleep
------+----------------------------+------------+-----------+-----------+-----------+-------
0 | BufMappingLock | 559375542 | 33542 | 320092 |
24025 | 0
1 | BufFreelistLock | 0 | 0 | 370709 |
47 | 0
2 | LockMgrLock | 0 | 0 | 41718885 |
734502 | 0
3 | OidGenLock | 33 | 0 | 0 |
0 | 0
4 | XidGenLock | 12572279 | 10095 | 11299469 |
20089 | 0
5 | ProcArrayLock | 8371330 | 72052 | 16965667 |
603294 | 0
6 | SInvalLock | 38822428 | 435 | 25917 |
128 | 0
7 | FreeSpaceLock | 0 | 0 | 16787 |
4 | 0
8 | WALInsertLock | 0 | 0 | 1239911 |
885 | 0
9 | WALWriteLock | 0 | 0 | 69907 |
5589 | 0
10 | ControlFileLock | 0 | 0 | 16686 |
1 | 0
11 | CheckpointLock | 0 | 0 | 34 |
0 | 0
12 | CheckpointStartLock | 69509 | 0 | 34 |
1 | 0
13 | CLogControlLock | 0 | 0 | 236763 |
183 | 0
14 | SubtransControlLock | 0 | 0 | 753773945 |
205273395 | 0
15 | MultiXactGenLock | 66 | 0 | 0 |
0 | 0
16 | MultiXactOffsetControlLock | 0 | 0 | 35 |
0 | 0
17 | MultiXactMemberControlLock | 0 | 0 | 34 |
0 | 0
18 | RelCacheInitLock | 0 | 0 | 0 |
0 | 0
19 | BgWriterCommLock | 0 | 0 | 61457 |
1 | 0
20 | TwoPhaseStateLock | 33 | 0 | 0 |
0 | 0
21 | TablespaceCreateLock | 0 | 0 | 0 |
0 | 0
22 | BufferIO | 0 | 0 | 695627 |
16 | 0
23 | BufferContent | 3568231805 | 1897 | 1361394 |
829 | 0
24 | CLog | 0 | 0 | 0 |
0 | 0
25 | SubTrans | 138571621 | 143208883 | 8122181 |
8132646 | 0
26 | MultiXactOffset | 0 | 0 | 0 |
0 | 0
27 | MultiXactMember | 0 | 0 | 0 |
0 | 0
(28 rows)
I am pleased if interested.
regards,
--------
Katsuhiko Okano
okano katsuhiko _at_ oss ntt co jp
---------------------------(end of broadcast)---------------------------
TIP 1: if posting/reading through Usenet, please send an appropriate
subscribe-nomail command to [EMAIL PROTECTED] so that your
message can get through to the mailing list cleanly
