MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 01/20/01 through 01/26/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 52,835 2,582,164
MED90 11,329 198,532
MED85 9,016 68,891
MED80 7,821 41,063
MED75 7,301 28,403
MED66 7,452 32,823
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,697 33,636
2-4 a.m. 950 14,651
4-6 a.m. 333 6,564
6-8 a.m. 1,323 30,067
8-10 a.m. 7,214 192,263
10-12 a.m. 15,606 530,445
12-2 p.m. 15,978 543,413
2-4 p.m. 20,612 580,960
4-6 p.m. 15,200 469,079
6-8 p.m. 7,998 242,436
8-10 p.m. 5,699 212,307
10-12 p.m. 3,144 96,055
__________ _____________ _________________
Total: 95,754 2,951,876
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 431
Davis 983
Irvine 237
Los Angeles 1,010
Riverside 21
San Diego 724
San Francisco 1,419
Santa Barbara 6
Santa Cruz 48
Lawrence Berkeley 44
Lawrence Livermore 16
Los Alamos 1
MELWEB 75,696
Searchlight 14,252
Other - UC 34
Other-Network UC 832
_____
95,754
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,558
Davis 12,835
Irvine 5,075
Los Angeles 12,420
Riverside 351
San Diego 6,346
San Francisco 12,931
Santa Barbara 521
Santa Cruz 623
Lawrence Berkeley 280
Lawrence Livermore 217
Los Alamos 0
MELWEB 2,890,129
Searchlight 0
Other - UC 108
Other-Network UC 6,482
_____
2,951,876
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 2.0
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:55
Average session length (minutes:seconds) 17:29
Longest session recorded (minutes:seconds) 212:02
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 438.6
Retrievals per search - standard deviation 5631.6
Percent of searches completed with 0 results 34.8%
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 95,754 14.5%
PRESENT 524,402 79.2%
INIT or CLOSE 41,736 6.3%
OTHER 412 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 6,262 4.7% 2,493 39.8% 4 1066.6 4918.4
PERSONAL AUTHOR 26,581 19.8% 7,726 29.1% 7 81.8 1102.1
TITLE WORD 10,059 7.5% 3,913 38.9% 2 217.1 2976.5
SUBSET 228 0.2% 58 25.4% 60 468.2 1716.9
SUBJECT WORD 276 0.2% 153 55.4% 11 1106.7 4277.2
SUBJECT 2,942 2.2% 1,714 58.3% 25 996.4 7486.1
EXACT SUBJECT 5,432 4.0% 1,476 27.2% 37 518.9 3013.8
MAJOR SUBJECT 205 0.2% 117 57.1% 32 655.3 1670.2
EXACT MAJOR SUBJ 641 0.5% 163 25.4% 22 267.7 746.2
EXACT TITLE 674 0.5% 412 61.1% 1 12.6 72.0
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,154 0.9% 344 29.8% 422 1774.1 3535.1
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 5 0.0% 4 80.0% 39 39.0 0.0
KEYWORD 58,351 43.4% 20,833 35.7% 19 859.1 8656.0
DATE 2,205 1.6% 665 30.2% 10 257.5 2303.7
LANGUAGE 7,231 5.4% 1,997 27.6% 31 550.2 3156.9
UNIQUE ID 322 0.2% 146 45.3% 1 1.0 0.3
ADDED 1,058 0.8% 1,058 100% 0 0.0 0.0
PUB TYPE 2,996 2.2% 759 25.3% 24 160.7 710.3
AUTHOR AFFIL. 772 0.6% 356 46.1% 10 39.0 173.7
CHEMICAL NAME 14 0.0% 11 78.6% 3,034 2029.7 1739.6
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 5,775 4.3% 1,912 33.1% 27 850.8 4328.0
AGE 263 0.2% 92 35.0% 51 260.0 602.5
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 187 0.1% 44 23.5% 83 950.9 2820.7
XXS 659 0.5% 391 59.3% 8 121.0 609.6
XMXS 105 0.1% 49 46.7% 7 2988.0 14092.5
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 35 0.0% 22 62.9% 126 178.5 189.5
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 25,913 27.1% 9,487 36.6% 8 361.2 3120.3
Single 69,841 72.9% 23,884 34.2% 17 784.7 7895.5
PRESENT commands, by type:
MARC 31.0%
OPAC 29.7%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS