Question

每当我尝试在Postgres数据库上进行简单的SELECT时，我都会收到此错误：

tutorial=> select id from table LIMIT 1;
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
WARNING:  out of shared memory
ERROR:  out of shared memory
HINT:  You might need to increase max_locks_per_transaction.

我尝试将“ max_locks_per_transaction ”增加到256，增加所有内存参数，它什么都不做。该命令只需要更长时间才能返回。

所有这些都在几个月内正常工作，然后出现此问题，我无法追踪日志以查找会发生什么。

出现此问题后，我尝试重新启动postgres后出现问题时的启动顺序：

LOG:  database system was not properly shut down; automatic recovery in progress
LOG:  redo starts at 2/2C7A1580
LOG:  invalid record length at 2/2C848AC8: wanted 24, got 0
LOG:  redo done at 2/2C848AA0
LOG:  last completed transaction was at log time 2018-01-29 14:38:52.726603+00
LOG:  MultiXact member wraparound protections are now enabled
LOG:  database system is ready to accept connections
LOG:  autovacuum launcher started

我的数据库实现 TimescaleDB 和 PostGIS 插件，仅由一个表组成。我可以做所有其他语句（INSERT，UPDATE等），但SELECT不起作用，这很烦人。

只关注这种过分的问题。我旁边只有 spatial_ref_sys 表格，我对此没有任何问题。

使用EXPLAIN，我得到完全相同的行为，没有信息记录：

tutorial=> EXPLAIN SELECT id FROM table LIMIT 1;
WARNING:  out of shared memory
ERROR:  out of shared memory
HINT:  You might need to increase max_locks_per_transaction.

服务器是Debian 2x86 64位内核和 2GB内存。我按照以下步骤使用 docker 设置了此数据库：http://docs.timescale.com/v0.8/getting-started/installation/linux/installation-docker

以下是我用来设置db的指令：

CREATE EXTENSION IF NOT EXISTS timescaledb CASCADE;
CREATE EXTENSION postgis; 
CREATE EXTENSION postgis_topology;
CREATE TABLE "public"."table" (
    "id" BIGSERIAL NOT NULL PRIMARY KEY,
    "id_s" int8 NOT NULL,
    "id_g" int8,
    "datetime" TIMESTAMPTZ DEFAULT now(),
    [...]
);
SELECT create_hypertable('table', 'datetime');
ALTER TABLE table ADD CONSTRAINT id_pkey PRIMARY KEY (id, datetime);
CREATE INDEX ON table (id_s, datetime DESC);
CREATE INDEX ON table (id_g, datetime DESC);
ALTER TABLE table ADD COLUMN geom geometry(POINT,2192)

PostgreSQL：简单SELECT上的“警告：超出共享内存”

0 个答案: