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68119480a7
During catcache searches, the most-recently searched entries are kept at the head of the list to speed up subsequent searches, keeping the "freshest" entries at its beginning. A rehash of the catcache was doing the opposite: fresh entries were moved to the tail of the newly-created buckets, causing a rehash to slow down a bit. When a rehash is done, this commit switches the code to use dlist_push_tail() instead of dlist_push_head(), so as fresh entries are kept at the head of the lists, not their tail. Author: ChangAo Chen <cca5507@qq.com> Reviewed-by: John Naylor <johncnaylorls@gmail.com> Reviewed-by: Michael Paquier <michael@paquier.xyz> Discussion: https://postgr.es/m/tencent_9EA10D8512B5FE29E7323F780A0749768708@qq.com