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authorRobert Haas <rhaas@postgresql.org>2022-12-19 14:43:09 -0500
committerRobert Haas <rhaas@postgresql.org>2022-12-19 14:43:09 -0500
commit10ea0f924a2788f9e701d6213745aaa5ca3efb8a (patch)
tree7b59764577d935ade39514b0c500237acb38a527 /contrib/jsonb_plpython/jsonb_plpython3u.control
parent7122f9d5437789312cb0a7e26e853bb8d2e57add (diff)
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Expose some information about backend subxact status.
A new function pg_stat_get_backend_subxact() can be used to get information about the number of subtransactions in the cache of a particular backend and whether that cache has overflowed. This can be useful for tracking down performance problems that can result from overflowed snapshots. Dilip Kumar, reviewed by Zhihong Yu, Nikolay Samokhvalov, Justin Pryzby, Nathan Bossart, Ashutosh Sharma, Julien Rouhaud. Additional design comments from Andres Freund, Tom Lane, Bruce Momjian, and David G. Johnston. Discussion: http://postgr.es/m/CAFiTN-ut0uwkRJDQJeDPXpVyTWD46m3gt3JDToE02hTfONEN=Q@mail.gmail.com
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