+set work_mem to 1048576;
+
alter table images add column is_render boolean NOT NULL DEFAULT false;
alter table images add column render_id integer;
CREATE UNIQUE INDEX unique_id_for_render ON images USING btree (vhost, event, id);
alter table deleted_images add column is_render boolean NOT NULL DEFAULT false;
alter table deleted_images add column render_id integer;
+
+drop index exif_info_key;
+alter table exif_info drop constraint exif_info_pkey;
+alter table exif_info add primary key ( image, key );