MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 09/30/00 through 10/06/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 46,881 2,584,245
MED90 9,373 186,574
MED85 6,849 61,933
MED80 5,894 27,675
MED75 5,576 17,012
MED66 5,584 15,204
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,468 68,338
2-4 a.m. 205 16,607
4-6 a.m. 259 9,887
6-8 a.m. 1,160 32,815
8-10 a.m. 5,453 192,997
10-12 a.m. 13,255 493,723
12-2 p.m. 14,282 466,637
2-4 p.m. 17,900 672,371
4-6 p.m. 12,706 472,311
6-8 p.m. 6,058 227,065
8-10 p.m. 3,651 134,598
10-12 p.m. 2,760 105,294
__________ _____________ _________________
Total: 80,157 2,892,643
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 203
Davis 1,128
Irvine 287
Los Angeles 509
Riverside 97
San Diego 764
San Francisco 1,569
Santa Barbara 13
Santa Cruz 11
Lawrence Berkeley 28
Lawrence Livermore 12
Los Alamos 2
MELWEB 61,653
Searchlight 13,197
Other - UC 74
Other-Network UC 610
_____
80,157
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,244
Davis 6,668
Irvine 3,195
Los Angeles 4,072
Riverside 769
San Diego 5,927
San Francisco 50,794
Santa Barbara 90
Santa Cruz 61
Lawrence Berkeley 185
Lawrence Livermore 182
Los Alamos 0
MELWEB 2,769,390
Searchlight 40,075
Other - UC 330
Other-Network UC 8,661
_____
2,892,643
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.7
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.7
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:52
Average session length (minutes:seconds) 17:24
Longest session recorded (minutes:seconds) 300:52
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 459.6
Retrievals per search - standard deviation 5753.3
Percent of searches completed with 0 results 33.0%
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 80,157 12.3%
PRESENT 532,303 81.9%
INIT or CLOSE 37,046 5.7%
OTHER 709 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 4,597 4.1% 1,737 37.8% 4 786.3 4240.6
PERSONAL AUTHOR 22,817 20.3% 6,417 28.1% 7 95.0 891.9
TITLE WORD 7,534 6.7% 2,561 34.0% 3 158.6 1454.9
SUBSET 208 0.2% 37 17.8% 36 291.2 1111.1
SUBJECT WORD 234 0.2% 86 36.8% 5 81.6 436.1
SUBJECT 2,445 2.2% 1,140 46.6% 21 445.0 2044.7
EXACT SUBJECT 4,970 4.4% 1,203 24.2% 36 527.7 3073.0
MAJOR SUBJECT 291 0.3% 126 43.3% 11 325.1 1548.2
EXACT MAJOR SUBJ 512 0.5% 106 20.7% 19 275.4 1110.9
EXACT TITLE 655 0.6% 425 64.9% 1 12.3 60.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,369 1.2% 613 44.8% 286 1476.4 3156.9
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 18 0.0% 3 16.7% 11 299.8 751.3
KEYWORD 49,308 43.8% 17,176 34.8% 19 933.4 8890.8
DATE 2,317 2.1% 494 21.3% 6 311.6 2905.9
LANGUAGE 5,983 5.3% 1,508 25.2% 34 580.1 4340.3
UNIQUE ID 170 0.2% 30 17.6% 1 1.1 0.4
ADDED 1,333 1.2% 677 50.8% 4 13.1 24.9
PUB TYPE 2,578 2.3% 529 20.5% 25 164.1 687.4
AUTHOR AFFIL. 706 0.6% 316 44.8% 9 112.3 1282.1
CHEMICAL NAME 8 0.0% 4 50.0% 3 59.3 113.8
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 3,872 3.4% 1,143 29.5% 29 920.1 5674.8
AGE 257 0.2% 54 21.0% 18 155.1 409.2
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 127 0.1% 38 29.9% 48 337.0 753.6
XXS 200 0.2% 79 39.5% 16 755.7 3312.3
XMXS 104 0.1% 55 52.9% 19 227.3 675.4
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 21 0.0% 14 66.7% 471 500.4 732.9
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 21,505 26.8% 7,057 32.8% 7 322.1 3061.4
Single 58,652 73.2% 19,415 33.1% 17 820.4 7993.2
PRESENT commands, by type:
MARC 31.3%
OPAC 31.2%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS