MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 08/18/01 through 08/24/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 39,437 2,020,914
MED90 7,351 119,083
MED85 5,537 55,179
MED80 4,758 25,233
MED75 4,443 15,429
MED66 4,552 18,748
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,252 31,973
2-4 a.m. 965 30,507
4-6 a.m. 163 13,824
6-8 a.m. 1,241 37,004
8-10 a.m. 4,967 163,818
10-12 a.m. 11,503 388,213
12-2 p.m. 11,691 399,284
2-4 p.m. 14,574 460,275
4-6 p.m. 10,986 357,044
6-8 p.m. 4,436 190,636
8-10 p.m. 2,746 110,929
10-12 p.m. 1,554 71,079
__________ _____________ _________________
Total: 66,078 2,254,586
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 274
Davis 500
Irvine 245
Los Angeles 700
Riverside 24
San Diego 602
San Francisco 1,281
Santa Barbara 47
Santa Cruz 72
Lawrence Berkeley 43
Lawrence Livermore 24
Los Alamos 0
MELWEB 66
Searchlight 3,335
Other - UC 58,543
Other-Network UC 322
_____
66,078
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,307
Davis 4,156
Irvine 37,800
Los Angeles 9,394
Riverside 199
San Diego 5,306
San Francisco 14,526
Santa Barbara 362
Santa Cruz 565
Lawrence Berkeley 152
Lawrence Livermore 266
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 2,171,899
Other-Network UC 5,654
_____
2,254,586
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
Standard deviation in seconds 2.2
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:51
Average session length (minutes:seconds) 21:19
Longest session recorded (minutes:seconds) 270:36
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 369.5
Retrievals per search - standard deviation 5206.8
Percent of searches completed with 0 results 33.3%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 66,078 12.4%
PRESENT 440,079 82.5%
INIT or CLOSE 26,667 5.0%
OTHER 726 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 4,378 4.8% 1,634 37.3% 4 714.1 4401.2
PERSONAL AUTHOR 22,102 24.3% 6,234 28.2% 7 95.7 1031.7
TITLE WORD 8,004 8.8% 3,286 41.1% 3 265.2 3312.2
SUBSET 137 0.2% 30 21.9% 27 335.7 1565.6
SUBJECT WORD 120 0.1% 62 51.7% 5 80.5 194.6
SUBJECT 1,506 1.7% 728 48.3% 17 493.0 2816.9
EXACT SUBJECT 3,360 3.7% 833 24.8% 31 324.2 1767.4
MAJOR SUBJECT 116 0.1% 39 33.6% 22 229.2 482.5
EXACT MAJOR SUBJ 408 0.4% 98 24.0% 15 523.7 2858.9
EXACT TITLE 617 0.7% 343 55.6% 1 29.9 104.4
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 840 0.9% 246 29.3% 369 1708.1 3544.9
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 35 0.0% 12 34.3% 17 51.5 83.2
KEYWORD 36,858 40.5% 12,968 35.2% 17 762.0 8313.1
DATE 1,559 1.7% 414 26.6% 6 88.3 586.2
LANGUAGE 4,156 4.6% 1,150 27.7% 28 400.2 3181.3
UNIQUE ID 186 0.2% 93 50.0% 1 1.0 0.0
ADDED 1,019 1.1% 457 44.8% 4 13.3 28.5
PUB TYPE 2,179 2.4% 488 22.4% 25 139.9 398.5
AUTHOR AFFIL. 569 0.6% 231 40.6% 10 94.0 651.8
CHEMICAL NAME 5 0.0% 4 80.0% 1 1.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 2,326 2.6% 787 33.8% 24 626.4 4000.5
AGE 218 0.2% 49 22.5% 14 61.0 165.7
ISN 8 0.0% 6 75.0% 1 1.0 0.0
ARTICLE 68 0.1% 9 13.2% 54 358.9 929.3
XXS 151 0.2% 54 35.8% 16 287.7 864.4
XMXS 52 0.1% 20 38.5% 5 57.6 147.3
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 17 0.0% 13 76.5% 11 12.5 10.4
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 17,827 27.0% 6,169 34.6% 7 220.2 2402.5
Single 48,251 73.0% 15,826 32.8% 15 673.9 7278.8
PRESENT commands, by type:
MARC 27.2%
OPAC 37.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS