Re: Certain query eating up all free memory (out of memory error)

EXPLAIN ANALYSE on smaller query:
"Seq Scan on teksty  (cost=0.00..1353.50 rows=1 width=695) (actual
time=0.220..12.354 rows=368 loops=1)"
"  Filter: (id = 1)"
"Total runtime: 12.488 ms"


Memory config:

# - Memory -

shared_buffers = 24MB
temp_buffers = 8MB
max_prepared_transactions = 5
work_mem = 16MB                                # min 64kB
maintenance_work_mem = 16MB                # min 1MB
max_stack_depth = 2MB                        # min 100kB

# - Free Space Map -

max_fsm_pages = 153600
#max_fsm_relations = 1000

Memory info from logs:

TopMemoryContext: 49416 total in 6 blocks; 7680 free (8 chunks); 41736 used
  TopTransactionContext: 8192 total in 1 blocks; 7856 free (1 chunks); 336 used
  Type information cache: 8192 total in 1 blocks; 1800 free (0
chunks); 6392 used
  CFuncHash: 8192 total in 1 blocks; 4936 free (0 chunks); 3256 used
  MbProcContext: 1024 total in 1 blocks; 928 free (6 chunks); 96 used
  Operator class cache: 8192 total in 1 blocks; 3848 free (0 chunks); 4344 used
  Operator lookup cache: 24576 total in 2 blocks; 14072 free (6
chunks); 10504 used
  MessageContext: 8192 total in 1 blocks; 752 free (0 chunks); 7440 used
  smgr relation table: 8192 total in 1 blocks; 2808 free (0 chunks); 5384 used
  TransactionAbortContext: 32768 total in 1 blocks; 32752 free (0
chunks); 16 used
  Portal hash: 8192 total in 1 blocks; 3912 free (0 chunks); 4280 used
  PortalMemory: 8192 total in 1 blocks; 8040 free (0 chunks); 152 used
    PortalHeapMemory: 1024 total in 1 blocks; 880 free (0 chunks); 144 used
      ExecutorState: 516096 total in 6 blocks; 15368 free (7 chunks);
500728 used
        SRF multi-call context: 2499608 total in 276 blocks; 714136
free (38704 chunks); 1785472 used
        ExprContext: 3157941940 total in 12908 blocks; 505592 free (11
chunks); 3157436348 used
  Relcache by OID: 8192 total in 1 blocks; 3376 free (0 chunks); 4816 used
  CacheMemoryContext: 667472 total in 20 blocks; 239368 free (1
chunks); 428104 used
    pg_toast_150116_index: 1024 total in 1 blocks; 240 free (0 chunks); 784 used
    pg_database_datname_index: 1024 total in 1 blocks; 344 free (0
chunks); 680 used
    pg_index_indrelid_index: 1024 total in 1 blocks; 304 free (0
chunks); 720 used
    pg_ts_dict_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
    pg_aggregate_fnoid_index: 1024 total in 1 blocks; 344 free (0
chunks); 680 used
    pg_language_name_index: 1024 total in 1 blocks; 344 free (0
chunks); 680 used
    pg_statistic_relid_att_index: 1024 total in 1 blocks; 240 free (0
chunks); 784 used
    pg_ts_dict_dictname_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
    pg_namespace_nspname_index: 1024 total in 1 blocks; 304 free (0
chunks); 720 used
    pg_opfamily_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
    pg_opclass_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
    pg_ts_parser_prsname_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
    pg_amop_fam_strat_index: 1024 total in 1 blocks; 88 free (0
chunks); 936 used
    pg_opclass_am_name_nsp_index: 1024 total in 1 blocks; 192 free (0
chunks); 832 used
    pg_trigger_tgrelid_tgname_index: 1024 total in 1 blocks; 240 free
(0 chunks); 784 used
    pg_cast_source_target_index: 1024 total in 1 blocks; 240 free (0
chunks); 784 used
    pg_auth_members_role_member_index: 1024 total in 1 blocks; 280
free (0 chunks); 744 used
    pg_attribute_relid_attnum_index: 1024 total in 1 blocks; 240 free
(0 chunks); 784 used
    pg_ts_config_cfgname_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
    pg_authid_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
    pg_ts_config_oid_index: 1024 total in 1 blocks; 344 free (0
chunks); 680 used
    pg_conversion_default_index: 1024 total in 1 blocks; 88 free (0
chunks); 936 used
    pg_language_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
    pg_enum_oid_index: 1024 total in 1 blocks; 344 free (0 chunks); 680 used
    pg_proc_proname_args_nsp_index: 1024 total in 1 blocks; 152 free
(0 chunks); 872 used
    pg_ts_parser_oid_index: 1024 total in 1 blocks; 344 free (0
chunks); 680 used
    pg_database_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
    pg_conversion_name_nsp_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
    pg_class_relname_nsp_index: 1024 total in 1 blocks; 240 free (0
chunks); 784 used
    pg_attribute_relid_attnam_index: 1024 total in 1 blocks; 280 free
(0 chunks); 744 used
    pg_class_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
    pg_amproc_fam_proc_index: 1024 total in 1 blocks; 88 free (0
chunks); 936 used
    pg_operator_oprname_l_r_n_index: 1024 total in 1 blocks; 88 free
(0 chunks); 936 used
    pg_index_indexrelid_index: 1024 total in 1 blocks; 304 free (0
chunks); 720 used
    pg_type_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
    pg_rewrite_rel_rulename_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
    pg_authid_rolname_index: 1024 total in 1 blocks; 304 free (0
chunks); 720 used
    pg_auth_members_member_role_index: 1024 total in 1 blocks; 280
free (0 chunks); 744 used
    pg_enum_typid_label_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
    pg_constraint_oid_index: 1024 total in 1 blocks; 344 free (0
chunks); 680 used
    pg_conversion_oid_index: 1024 total in 1 blocks; 344 free (0
chunks); 680 used
    pg_ts_template_tmplname_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
    pg_ts_config_map_index: 1024 total in 1 blocks; 192 free (0
chunks); 832 used
    pg_namespace_oid_index: 1024 total in 1 blocks; 344 free (0
chunks); 680 used
    pg_type_typname_nsp_index: 1024 total in 1 blocks; 280 free (0
chunks); 744 used
    pg_operator_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
    pg_amop_opr_fam_index: 1024 total in 1 blocks; 240 free (0 chunks); 784 used
    pg_proc_oid_index: 1024 total in 1 blocks; 304 free (0 chunks); 720 used
    pg_opfamily_am_name_nsp_index: 1024 total in 1 blocks; 192 free (0
chunks); 832 used
    pg_ts_template_oid_index: 1024 total in 1 blocks; 344 free (0
chunks); 680 used
  MdSmgr: 8192 total in 1 blocks; 7984 free (0 chunks); 208 used
  LOCALLOCK hash: 8192 total in 1 blocks; 3912 free (0 chunks); 4280 used
  Timezones: 48616 total in 2 blocks; 5968 free (0 chunks); 42648 used
  ErrorContext: 8192 total in 1 blocks; 8176 free (4 chunks); 16 used