From 5d1f54052c34b4b92f4639748794b0d937a4604c Mon Sep 17 00:00:00 2001 From: Trowbridge Date: Wed, 12 Feb 2020 09:46:21 -0500 Subject: [PATCH] notes --- pgbdager.md | 2 +- postgres/out_of_memory.md | 12 ++++++++++++ 2 files changed, 13 insertions(+), 1 deletion(-) create mode 100644 postgres/out_of_memory.md diff --git a/pgbdager.md b/pgbdager.md index ce44791..9050f43 100644 --- a/pgbdager.md +++ b/pgbdager.md @@ -1,3 +1,3 @@ creates a file `out.html` by default - sudo pgbadger --prefix '%t [%p]: [%l-1] user=%u,db=%d,app=%a,client=%h,remote=%r ' //var/log/postgresql/postgresql-2020-02* + sudo pgbadger --prefix '%t [%p]: [%l-1] user=%u,db=%d,app=%a,client=%h,remote=%r ' //var/log/postgresql/postgresql-2020-02* \ No newline at end of file diff --git a/postgres/out_of_memory.md b/postgres/out_of_memory.md new file mode 100644 index 0000000..f7f5c0e --- /dev/null +++ b/postgres/out_of_memory.md @@ -0,0 +1,12 @@ +logs from trying to start with not enough memory: +``` +207716 2020-02-11 11:33:02 EST [2969]: [1-1] user=,db=,app=,client=,remote=LOG: starting PostgreSQL 12.1 (Ubuntu 12.1-1.pgdg18.04+1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0, 64-bit +207717 2020-02-11 11:33:02 EST [2969]: [2-1] user=,db=,app=,client=,remote=LOG: listening on IPv4 address "0.0.0.0", port 5030 +207718 2020-02-11 11:33:02 EST [2969]: [3-1] user=,db=,app=,client=,remote=LOG: listening on IPv6 address "::", port 5030 +207719 2020-02-11 11:33:04 EST [2969]: [4-1] user=,db=,app=,client=,remote=LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5030" +207720 2020-02-11 11:33:06 EST [2969]: [5-1] user=,db=,app=,client=,remote=FATAL: could not map anonymous shared memory: Cannot allocate memory +207721 2020-02-11 11:33:06 EST [2969]: [6-1] user=,db=,app=,client=,remote=HINT: This error usually means that PostgreSQL's request for a shared memory segment exceeded available memory, swap space, or huge pages. To reduce the request size (currently 4423614464 bytes ), reduce PostgreSQL's shared memory usage, perhaps by reducing shared_buffers or max_connections. +207722 2020-02-11 11:33:06 EST [2969]: [7-1] user=,db=,app=,client=,remote=LOG: database system is shut down +207723 pg_ctl: could not start server +207724 Examine the log output. +``` \ No newline at end of file