add better index for finding unindexed paths #29118
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for the following query 'SELECT "path" FROM "oc_filecache" WHERE ("storage" = $storage) AND ("size" < 0) ORDER BY "fileid" DESC LIMIT 1;'
currently the database will in some cases decide to priorize the sort by fileid over the filter when picking what index to use, resulting in a much slower query.
by creating an index that allows first sorting by fileid and also filter by storage and size this case will be greatly sped up
Signed-off-by: Robin Appelman <robin@icewind.nl>
PVince81
approved these changes
Oct 8, 2021
CarlSchwan
approved these changes
Oct 8, 2021
skjnldsv
approved these changes
Oct 8, 2021
skjnldsv
added
4. to release
|
@icewind1991 backports? wouldn't be too good for patch releases if we don't want DB updates |
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/backport to stable22 |
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/backport to stable21 |
This was referenced Jan 11, 2022
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for the following query
SELECT "path" FROM "oc_filecache" WHERE ("storage" = $storage) AND ("size" < 0) ORDER BY "fileid" DESC LIMIT 1;which is used by the background scanner.currently the database will in some cases decide to prioritize the sort by fileid over the filter when picking what index to use, resulting in a much slower query.
by creating an index that allows first sorting by fileid and also filter by storage and size this case will be greatly sped up
Signed-off-by: Robin Appelman robin@icewind.nl