Postgresql 9.6 太多的standard_conforming_strings 占了太多连接。 怎么解决？

我用
SELECT pid, datname, usename, query , state FROM pg_stat_activity WHERE state IN ('idle in transaction', 'active');
结果

21574,niubility,postgres,show standard_conforming_strings,idle in transaction
21563,niubility,postgres,show standard_conforming_strings,idle in transaction
21559,niubility,postgres,show standard_conforming_strings,idle in transaction
21575,niubility,postgres,show standard_conforming_strings,idle in transaction
21799,niubility,postgres,show standard_conforming_strings,idle in transaction
21614,niubility,postgres,"SELECT pid, datname, usename, query , state FROM pg_stat_activity WHERE state IN ('idle in transaction', 'active')",active
21584,niubility,postgres,show standard_conforming_strings,idle in transaction
21585,niubility,postgres,show standard_conforming_strings,idle in transaction
21845,niubility,postgres,show standard_conforming_strings,idle in transaction
22195,niubility,postgres,show standard_conforming_strings,idle in transaction
22253,niubility,postgres,show standard_conforming_strings,idle in transaction
21680,niubility,postgres,show standard_conforming_strings,idle in transaction
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21907,niubility,postgres,show standard_conforming_strings,idle in transaction
21842,niubility,postgres,show standard_conforming_strings,idle in transaction
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9025,niubility,postgres,show standard_conforming_strings,idle in transaction
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21998,niubility,postgres,show standard_conforming_strings,idle in transaction
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12973,niubility,postgres,show standard_conforming_strings,idle in transaction
12587,niubility,postgres,show standard_conforming_strings,idle in transaction
12588,niubility,postgres,show standard_conforming_strings,idle in transaction
12685,niubility,postgres,show standard_conforming_strings,idle in transaction
12582,niubility,postgres,show standard_conforming_strings,idle in transaction
12688,niubility,postgres,show standard_conforming_strings,idle in transaction
12974,niubility,postgres,show standard_conforming_strings,idle in transaction
14274,niubility,postgres,show standard_conforming_strings,idle in transaction
13285,niubility,postgres,show standard_conforming_strings,idle in transaction
13078,niubility,postgres,show standard_conforming_strings,idle in transaction
13381,niubility,postgres,show standard_conforming_strings,idle in transaction
13176,niubility,postgres,show standard_conforming_strings,idle in transaction
13079,niubility,postgres,show standard_conforming_strings,idle in transaction
13286,niubility,postgres,show standard_conforming_strings,idle in transaction
13081,niubility,postgres,show standard_conforming_strings,idle in transaction
13382,niubility,postgres,show standard_conforming_strings,idle in transaction
13574,niubility,postgres,show standard_conforming_strings,idle in transaction
13083,niubility,postgres,show standard_conforming_strings,idle in transaction
13179,niubility,postgres,show standard_conforming_strings,idle in transaction
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14967,niubility,postgres,show standard_conforming_strings,idle in transaction
14964,niubility,postgres,show standard_conforming_strings,idle in transaction
14067,niubility,postgres,show standard_conforming_strings,idle in transaction
14071,niubility,postgres,show standard_conforming_strings,idle in transaction
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14375,niubility,postgres,show standard_conforming_strings,idle in transaction
14270,niubility,postgres,show standard_conforming_strings,idle in transaction
14271,niubility,postgres,show standard_conforming_strings,idle in transaction
14275,niubility,postgres,show standard_conforming_strings,idle in transaction
14376,niubility,postgres,show standard_conforming_strings,idle in transaction
14574,niubility,postgres,show standard_conforming_strings,idle in transaction
14370,niubility,postgres,show standard_conforming_strings,idle in transaction
14371,niubility,postgres,show standard_conforming_strings,idle in transaction
14787,niubility,postgres,show standard_conforming_strings,idle in transaction
14575,niubility,postgres,show standard_conforming_strings,idle in transaction
14688,niubility,postgres,show standard_conforming_strings,idle in transaction
16765,niubility,postgres,show standard_conforming_strings,idle in transaction
14683,niubility,postgres,show standard_conforming_strings,idle in transaction
14684,niubility,postgres,show standard_conforming_strings,idle in transaction
14788,niubility,postgres,show standard_conforming_strings,idle in transaction
14792,niubility,postgres,show standard_conforming_strings,idle in transaction
16060,niubility,postgres,show standard_conforming_strings,idle in transaction
14794,niubility,postgres,show standard_conforming_strings,idle in transaction
15054,niubility,postgres,show standard_conforming_strings,idle in transaction
22432,niubility,postgres,show standard_conforming_strings,idle in transaction
15056,niubility,postgres,show standard_conforming_strings,idle in transaction
18212,niubility,postgres,show standard_conforming_strings,idle in transaction
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22433,niubility,postgres,show standard_conforming_strings,idle in transaction
18316,niubility,postgres,show standard_conforming_strings,idle in transaction
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18515,niubility,postgres,show standard_conforming_strings,idle in transaction
18813,niubility,postgres,show standard_conforming_strings,idle in transaction
18520,niubility,postgres,show standard_conforming_strings,idle in transaction
18892,niubility,postgres,show standard_conforming_strings,idle in transaction
12583,niubility,postgres,show standard_conforming_strings,idle in transaction
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