2025-11-16 09:28:22.437 UTC postmaster[49565] LOG:  starting PostgreSQL 19devel on x86_64-linux, compiled by gcc-14.2.0, 64-bit
2025-11-16 09:28:22.437 UTC postmaster[49565] LOG:  listening on Unix socket "/tmp/pg_regress-IIg6Ve/.s.PGSQL.40059"
2025-11-16 09:28:22.440 UTC startup[49580] LOG:  database system was shut down at 2025-11-16 09:28:22 UTC
2025-11-16 09:28:22.450 UTC postmaster[49565] LOG:  database system is ready to accept connections
2025-11-16 09:28:22.744 UTC client backend[49612] pg_regress/buffer_resize LOG:  shared buffers are already at 16384, no need to resize
2025-11-16 09:28:22.744 UTC client backend[49612] pg_regress/buffer_resize STATEMENT:  SELECT pg_resize_shared_buffers();
2025-11-16 09:28:22.767 UTC postmaster[49565] LOG:  received SIGHUP, reloading configuration files
2025-11-16 09:28:22.768 UTC postmaster[49565] LOG:  parameter "shared_buffers" changed to "64MB"
2025-11-16 09:28:22.785 UTC client backend[49626] pg_regress/buffer_resize LOG:  resizing shared buffers from 16384 to 8192
2025-11-16 09:28:22.785 UTC client backend[49626] pg_regress/buffer_resize STATEMENT:  SELECT pg_resize_shared_buffers();
2025-11-16 09:28:22.785 UTC client backend[49626] pg_regress/buffer_resize LOG:  Phase 1: Shrinking buffer pool, restricting allocations to 8192 buffers
2025-11-16 09:28:22.785 UTC client backend[49626] pg_regress/buffer_resize STATEMENT:  SELECT pg_resize_shared_buffers();
2025-11-16 09:28:22.785 UTC client backend[49626] pg_regress/buffer_resize LOG:  Phase 1: Processing SHBUF_SHRINK barrier - NBuffers = 16384, coordinator is 49626
2025-11-16 09:28:22.785 UTC client backend[49626] pg_regress/buffer_resize STATEMENT:  SELECT pg_resize_shared_buffers();
2025-11-16 09:28:22.785 UTC background writer[49579] LOG:  Phase 1: Processing SHBUF_SHRINK barrier - NBuffers = 16384, coordinator is 49626
2025-11-16 09:28:22.785 UTC autovacuum launcher[49584] LOG:  Phase 1: Processing SHBUF_SHRINK barrier - NBuffers = 16384, coordinator is 49626
2025-11-16 09:28:22.785 UTC checkpointer[49578] LOG:  Phase 1: Processing SHBUF_SHRINK barrier - NBuffers = 16384, coordinator is 49626
2025-11-16 09:28:22.785 UTC walwriter[49583] LOG:  Phase 1: Processing SHBUF_SHRINK barrier - NBuffers = 16384, coordinator is 49626
2025-11-16 09:28:22.786 UTC logical replication launcher[49585] LOG:  Phase 1: Processing SHBUF_SHRINK barrier - NBuffers = 16384, coordinator is 49626
2025-11-16 09:28:22.786 UTC client backend[49626] pg_regress/buffer_resize LOG:  all backends acknowledged PROCSIGNAL_BARRIER_SHBUF_SHRINK barrier
2025-11-16 09:28:22.786 UTC client backend[49626] pg_regress/buffer_resize STATEMENT:  SELECT pg_resize_shared_buffers();
2025-11-16 09:28:22.786 UTC client backend[49626] pg_regress/buffer_resize LOG:  evicting buffers 8193..16384
2025-11-16 09:28:22.786 UTC client backend[49626] pg_regress/buffer_resize STATEMENT:  SELECT pg_resize_shared_buffers();
2025-11-16 09:28:22.786 UTC client backend[49626] pg_regress/buffer_resize LOG:  Phase 2: Remapping shared memory segments and updating structures
2025-11-16 09:28:22.786 UTC client backend[49626] pg_regress/buffer_resize STATEMENT:  SELECT pg_resize_shared_buffers();
TRAP: failed Assert("segment->shmem_reserved == mapping->shmem_reserved"), File: "../src/backend/port/sysv_shmem.c", Line: 1029, PID: 49626
postgres: postgres regression_buffermgr [local] SELECT(ExceptionalCondition+0x53) [0x55e396972b5f]
postgres: postgres regression_buffermgr [local] SELECT(AnonymousShmemResize+0x693) [0x55e396585768]
postgres: postgres regression_buffermgr [local] SELECT(pg_resize_shared_buffers+0x155) [0x55e39668df91]
postgres: postgres regression_buffermgr [local] SELECT(+0xc14260) [0x55e3962cf260]
postgres: postgres regression_buffermgr [local] SELECT(ExecInterpExprStillValid+0x39) [0x55e3962c33d5]
postgres: postgres regression_buffermgr [local] SELECT(+0xcaeab0) [0x55e396369ab0]
postgres: postgres regression_buffermgr [local] SELECT(+0xcaeb21) [0x55e396369b21]
postgres: postgres regression_buffermgr [local] SELECT(+0xcaebae) [0x55e396369bae]
postgres: postgres regression_buffermgr [local] SELECT(+0xcaeef3) [0x55e396369ef3]
postgres: postgres regression_buffermgr [local] SELECT(+0xc37df3) [0x55e3962f2df3]
postgres: postgres regression_buffermgr [local] SELECT(+0xc22350) [0x55e3962dd350]
postgres: postgres regression_buffermgr [local] SELECT(+0xc22ac7) [0x55e3962ddac7]
postgres: postgres regression_buffermgr [local] SELECT(standard_ExecutorRun+0x2cd) [0x55e3962df262]
postgres: postgres regression_buffermgr [local] SELECT(ExecutorRun+0x1f) [0x55e3962df2c2]
postgres: postgres regression_buffermgr [local] SELECT(+0x104ad64) [0x55e396705d64]
postgres: postgres regression_buffermgr [local] SELECT(PortalRun+0x396) [0x55e396708e1d]
postgres: postgres regression_buffermgr [local] SELECT(+0x1046e14) [0x55e396701e14]
postgres: postgres regression_buffermgr [local] SELECT(PostgresMain+0xc77) [0x55e396705098]
postgres: postgres regression_buffermgr [local] SELECT(BackendMain+0x92) [0x55e3966fa736]
postgres: postgres regression_buffermgr [local] SELECT(postmaster_child_launch+0x1cb) [0x55e396594a4f]
postgres: postgres regression_buffermgr [local] SELECT(+0xedee57) [0x55e396599e57]
postgres: postgres regression_buffermgr [local] SELECT(+0xee139f) [0x55e39659c39f]
postgres: postgres regression_buffermgr [local] SELECT(PostmasterMain+0x14b7) [0x55e39659dcb5]
postgres: postgres regression_buffermgr [local] SELECT(main+0x293) [0x55e3963c44d3]
/lib/x86_64-linux-gnu/libc.so.6(+0x29ca8) [0x7f4a82033ca8]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x85) [0x7f4a82033d65]
postgres: postgres regression_buffermgr [local] SELECT(_start+0x21) [0x55e395f5e221]
2025-11-16 09:28:23.294 UTC postmaster[49565] LOG:  client backend (PID 49626) was terminated by signal 6: Aborted
2025-11-16 09:28:23.294 UTC postmaster[49565] DETAIL:  Failed process was running: SELECT pg_resize_shared_buffers();
2025-11-16 09:28:23.294 UTC postmaster[49565] LOG:  terminating any other active server processes
2025-11-16 09:28:23.298 UTC postmaster[49565] LOG:  all server processes terminated; reinitializing
2025-11-16 09:28:23.414 UTC postmaster[49565] LOG:  received fast shutdown request
2025-11-16 09:28:23.415 UTC startup[49684] LOG:  database system was interrupted; last known up at 2025-11-16 09:28:22 UTC
2025-11-16 09:28:23.415 UTC startup[49684] LOG:  database system was not properly shut down; automatic recovery in progress
2025-11-16 09:28:23.417 UTC startup[49684] LOG:  redo starts at 0/017A8370