| From: | "tsunakawa(dot)takay(at)fujitsu(dot)com" <tsunakawa(dot)takay(at)fujitsu(dot)com> |
|---|---|
| To: | "k(dot)jamison(at)fujitsu(dot)com" <k(dot)jamison(at)fujitsu(dot)com> |
| Cc: | 'Kyotaro Horiguchi' <horikyota(dot)ntt(at)gmail(dot)com>, "amit(dot)kapila16(at)gmail(dot)com" <amit(dot)kapila16(at)gmail(dot)com>, "tgl(at)sss(dot)pgh(dot)pa(dot)us" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "andres(at)anarazel(dot)de" <andres(at)anarazel(dot)de>, "robertmhaas(at)gmail(dot)com" <robertmhaas(at)gmail(dot)com>, "tomas(dot)vondra(at)2ndquadrant(dot)com" <tomas(dot)vondra(at)2ndquadrant(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | RE: [Patch] Optimize dropping of relation buffers using dlist |
| Date: | 2020-10-21 07:36:36 |
| Message-ID: | TYAPR01MB2990D9D83C1C5533A4E126EFFE1C0@TYAPR01MB2990.jpnprd01.prod.outlook.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
RelationTruncate() invalidates the cached fork sizes as follows. This causes smgrnblocks() return accurate=false, resulting in not running optimization. Try commenting out for non-recovery case.
/*
* Make sure smgr_targblock etc aren't pointing somewhere past new end
*/
rel->rd_smgr->smgr_targblock = InvalidBlockNumber;
for (int i = 0; i <= MAX_FORKNUM; ++i)
rel->rd_smgr->smgr_cached_nblocks[i] = InvalidBlockNumber;
Regards
Takayuki Tsunakawa
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Peter Smith | 2020-10-21 08:07:26 | Re: [HACKERS] logical decoding of two-phase transactions |
| Previous Message | Kyotaro Horiguchi | 2020-10-21 06:57:58 | Re: Transactions involving multiple postgres foreign servers, take 2 |