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author | unarist <m.unarist@gmail.com> | 2017-11-28 04:22:27 +0900 |
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committer | Eugen Rochko <eugen@zeonfederated.com> | 2017-11-27 20:22:27 +0100 |
commit | 7fb850e987c92a6b863cc1f66a6ec7318460f1de (patch) | |
tree | 95bea17ae5fba5b7b7071f510c5f60d353651efe /db/migrate/20171125185353_add_index_reblog_of_id_and_account_to_statuses.rb | |
parent | 1c5b0e333464d8da3de73e4886502c816cb8173e (diff) |
Merge indexes for reblog on statuses table (#5831)
We added an index for `[account_id, reblog_of_id]`, but we already have a similar index for `reblog_of_id`. Those index will be bigger according to statuses count. For example, `reblog_of_id` index uses 800MB for 10GB statuses table. So this patch swaps indexed columns like `[reblog_of_id, account_id]`, then it will covers both usage with single index. Since those index creation may take a while, I've also disabled previous index creation.
Diffstat (limited to 'db/migrate/20171125185353_add_index_reblog_of_id_and_account_to_statuses.rb')
-rw-r--r-- | db/migrate/20171125185353_add_index_reblog_of_id_and_account_to_statuses.rb | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/db/migrate/20171125185353_add_index_reblog_of_id_and_account_to_statuses.rb b/db/migrate/20171125185353_add_index_reblog_of_id_and_account_to_statuses.rb new file mode 100644 index 000000000..37662eaa5 --- /dev/null +++ b/db/migrate/20171125185353_add_index_reblog_of_id_and_account_to_statuses.rb @@ -0,0 +1,7 @@ +class AddIndexReblogOfIdAndAccountToStatuses < ActiveRecord::Migration[5.1] + disable_ddl_transaction! + + def change + add_index :statuses, [:reblog_of_id, :account_id], algorithm: :concurrently + end +end |