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Add lfc_max_mem GUC

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Konstantin Knizhnik
2023-08-23 14:49:22 +03:00
parent 7b8ccee8db
commit fc206e60d2
1 changed files with 15 additions and 0 deletions
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15
pgxn/neon/file_cache.c
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@@ -91,6 +91,7 @@ typedef struct FileCacheControl
static HTAB* lfc_hash;
static LWLockId lfc_lock;
static int lfc_max_size;
static int lfc_max_mem;
static int lfc_size_limit;
static int lfc_free_space_watermark;
static int lfc_free_memory_watermark;
@@ -181,6 +182,7 @@ lfc_shmem_request(void)
prev_shmem_request_hook();
#endif
lfc_max_size = Min(lfc_max_size, lfc_max_mem);
RequestAddinShmemSpace(sizeof(FileCacheControl) + lfc_max_size*MB + CHUNK_SIZE + hash_estimate_size(SIZE_MB_TO_CHUNKS(lfc_max_size)+1, sizeof(FileCacheEntry)));
RequestNamedLWLockTranche("lfc_lock", 1);
}
@@ -324,6 +326,19 @@ lfc_init(void)
NULL,
NULL);
DefineCustomIntVariable("neon.max_inmem_cache_size",
"Maximal size used by Neon local file cache in memory",
NULL,
&lfc_max_mem,
128, /* 128Mb */
0,
INT_MAX,
PGC_POSTMASTER,
GUC_UNIT_MB,
NULL,
NULL,
NULL);
DefineCustomIntVariable("neon.file_cache_size_limit",
"Current limit for size of Neon local file cache",
NULL,